Unistellar eVscope 2 - Information (4.5" Newton)

Introduction | About the eVscope | Look | Sensor, Pixel Data, Field of View, Image Size (Pixels) | Visited Sky Objects | How To Observe with the eVscope 2 | First Experiences | Photo Attempts | First Conclusions | Links || Appendix: Data for the Unistellar eVscope 2 | Appendix 2: eVscope 2 vs. eVscope Equinox and vs. the original eVscope | Appendix 3: Published and Sent Photos, Comparisons with the Original eVscope

In preparation

Note: This page will describe my third sample of the Unistellar eVscope 2.

On this page I provide some information about my electronic 4,5" Newton telescope Unistellar eVscope 2, 112 mm/450 mm (f/4)*. After the launches of the original eVscope at the end of 2019 and of the eVscope Equinox (no eyepiece) in spring 2021, Unistellar launched the eVscope 2 in mid-September 2021. This model looks like the original eVscope, but offers a new sensor chip (IMX347) and an improved electronic eyepiece (designed by Nikon). In many respects, the eVscope 2 looks like "what the original eVscope should have been"... More on the eVscope 2 on this page and from Unistellar!
*) Ordered on November 9, 2021; first sample delivered on December 3, 2021; second sample delivered on April 8, 2022; third sample delivered on August ?, 2022 (only this third sample is covered here).

Notes:

Note: I received my eVscope 2 at the beginning of December 2021. I bought it, because I was convinced by the better image quality* of the published sample photos and by the slightly larger field of view. I therefore sold my eVscope in mid-March 2022.

*) Since I was not satisfied with the results of my new eVscope 2, Unistellar offered to check and possibly repair my eVscope 2. So, I sent it to Unistellar on February 14, 2022 and received information on February 18 that my eVscope 2 had been repaired and will be returned to me. When asked, I was told that there was a problem with the primary mirror, which was slightly under tension and therefore produced blurry images. As proof of the repair, I received a photo of Alnilam, which looks much better than my similar photo of Alnitak (near the Flame Nebula).

I describe my subsequent tests with the repaired eVscope 2 on the pages First Experiences (After Repair - Part 1) and First Experiences (After Repair - Part 2). According to this, the repair resulted in an improvement, but did not completely eliminate the mirror tension. Unistellar therefore offered me to return my eVscope 2 (end of March 2022) and exchange it for a new one. This arrived on April 8, 2022. For my first experiences with the new eVscope 2 sample, see page First Experiences. Because it suffered from the same issues, I sent it for repair to Unistellar on May 4, 2022.

After inspection, Unistellar offered to send me another new one and also offered to send me photos taken with it beforehand for evaluation. On August 11, 2022, I received a photo and expect my third new eVscope 2 to arrive at my home from mid to end of August 2022.

 

Introduction

In September 2021 Unistellar launched the eVscope 2, which offers an improved electronic eyepiece and a new, larger sensor (Sony IMX347). It does not differ much from the original eVscope with respect to its look. It costs including the backpack, with which it is sold as a package, 800 Euros more than the original model without a backpack. The differences between the eVscope models (the original eVscope is no longer available) are described here.

Update: On February 1, 2022, I received a newsletter from Unistellar announcing a price increase for the eVscope 2. On the Unistellar Website, I then found prices of 4700 EUR for the eVscope 2 with backpack (instead of 3800 EUR) and of 4500 EUR for the model without a backpack (the eVscope eQuinox remained at 2800 EUR). All prices one euro less, shipping included, and are given without guarantee...

Photos: My second eVscope 2 (April 9-10, 2022)

Delivery

While there had been problems with the delivery of my first eVscope 2 copy (but they could be solved...), there were no problems with the delivery of my second copy. It was shipped on April 5, 2022 and arrived at my door on April 8, 2022.

 

About the eVscope 2

What is the eVscope 2?

Since the eVscope 2 is an update and improvement of the original eVscope, I will not repeat the main characteristics of the eVscope family of electronic telescopes here. See page eVscope - Information for more information on this.

Details and technical data can be found at Data for the Unistellar eVscope 2.

Brief History of the eVscope, Who is Behind the eVscope?

For the history of the eVscope and the people behind it, see eVscope - Information.

Why Did I Buy an eVscope 2?

On the one hand, the eVscope was exactly what I would expect from an electronic telescope. On the other hand, it gave me not only pleasure, but also a lot of frustration. That was to be expected with new technology, but my hope was actually that certain initial problems, especially of the app, would be eliminated faster than actually happened. Nevertheless, O was happy to have opted for the eVscope on Kickstarter. That way, it was considerably more affordable than when I had bought it later at a dealer.

The eVscope's "competition" consists of the Vaonis Stellina and Vespera refractors (I ordered the latter, again on Kickstarter on the one hand), and of self-assembled EAA configurations on the other. I have either started (Vespera) or even already explored both of these options (own EAA configurations).

For exploring my own EAA configurations, I bought an Atik Infinity and meanwhile also an ASI224 camera. The latter has the same sensor as the eVscope, so that I can use it to compare how the eVscope fares with respect to self-assembled EAA configurations. In comparison with my own EAA configurations, I noticed the aggressive image processing of the eVscope, looking more like "painting" and causing details to be lost (most noticeable and "worst" in the case of the Orion Nebula M 42). However, with app version 1.3, Unistellar released an image processing that, in addition to upscaling the photos, produces much more detailed photos. Actually, I would have to use it to repeat all my eVscope photos, which would be quite an effort....

The Vaonis telescopes, on the other hand, provide better image quality than the eVscope, but in return you have to wait much longer for the result, at least if you value good image quality. What this means in detail, I will find out after the Vespera has arrived at my place. Overall, the Vaonis telescopes seem to me to offer a very different "observing experience" than the eVscope: you have to be much more patient! When I present the eVscope to others, I notice how their patience runs out after just a few minutes. In that case, a Stellina or Vespera would probably not be appropriate at all.... Thus, the eVscope shines for me with its quick and easy setup and the possibility to access and photograph many targets in one evening. With my own EAA configurations, on the other hand, I never got beyond testing.... I put some hope on the StellarMate astrocomputer, with which I can set up small equipments in 5-10 minutes. But I have not yet been able to gain any experience with its GoTo behavior...

Somewhat surprisingly for me, Unistellar announced the eVscope 2 in September 2021, whose most important innovation for me is a new sensor (IMX 347) with slightly more pixels and a little more field of view - enough to show the moon completely now. At first, the eVscope 2 did not appeal to me much, especially since I found 10% discount for eVscope owners to be quite "stingy". However, after more and more image samples (there are still far too few!) were published, I started to change my opinion. Somehow, the eVscope 2 seemed to me like the telescope the eVscope should have been. And because I am quite convinced of the basic concept of the eVscope, I decided to order the eVscope 2 before the rebate period expired (which was not without problems...) and received it on December 3, 2021 after a "one-day detour" to Dresden.

However, this first sample had a main mirror under tension, which could not be completely eliminated even by a repair by Unistellar. So Unistellar finally offered me to exchange the first specimen for a new one, which was done in early April 2022. At the beginning of May 2022, I also sent this second copy to Unistellar for inspection/repair. Since the problems could not be solved, Unistellar offered to send me another new eVscope 2. This third new sample is the topic of this page.

 

Look

Note: In order to save some unnecessary work, I present the unboxing of my second sample here (April 2022)! Everything should look the same withthe third sample...

Unboxing

The Box

    
    

The outer box..

 

Ditto

 

Small damage to the outer box (bottom right) - not an issue...

 
 

Box weight: 17.7 kg,
Box size: 800 x 575 x 340 mm (L x W x H, measured myself)

The labels...

 

The label, closer look...

 

 

Opening the Box

         

Outer box opened...

 

Ditto, closer view

 

Even closerQ

 
 
The Universe Awaits!  

Ditto, farther away

 

Second inner lid opened

   

Ditto, closer view

 

Instructions

 

Instructions taken out

 
 

Foam lid removed

 

Ditto, backpack, tripod and accessory box visible

 

Ditto, closer view

   

The empty box with foam

  Ditto  

eVscope 2 serial number

Unpacked Accessories

         

Instructions, tripod, and accessory box taken out

 

Accessory box opened

 

Accessory box opened and accessories partly taken out

         

Tools shown

 

Ditto

 

Backpack "parked"

Backpack Content...

         

Backpack taken out of the box

 

Backpack opened: you can see the eVscope 2 and the accessory bag

 

Ditto, closer view

    
    

eVscope in backpack, accessory bag taken out

 

eVscope taken out a little, you can see the protection foan

 

Ditto, closer view

    
    

Transportation protection

 

Protection removed

 

Empty backpack

Assembled - eVscope 2 Look

    
    

eVscope 2 on tripod

 

Ditto

 

Ditto

 
 

eVscope 2, closer look

 

The proud owner with his eVscope 2

 

Ditto

Details

   

USB connections

 

Focusser

 

Lid and Bahtinov mask

         

Eypiece with lid

 

Eypiece without lid

 

Lid and Bahtinov mask

Backpack

      
Backpack, tripod side   Backpack, other side

 

Backpack, tripod

 
 

Backpack

 

Backpack in action

 

Ditto

 
 

Ditto

 

Ditto

 

Ditto

      

Baclpack

 

Rain cover pulled out

 

Ditto

   

Rain cover pulled over backpack (no tripod)

 

Ditto, back side

 

Ditto, back side

 

Sensor, Pixel Data, Field of View, Image Size (Pixels)

The eVscope2 uses the new sensor Sony IMX347 (CMOS), with a used resolution of about 3 MegaPixels, or 2048 x 1536 pixels (H/V). The pixel size is 2.9µm (quadratic pixels).

With this, all sizes are known to calculate the field of view of the eVscope, which amounts to 0.78° x 0.57° (47' x 34').

The following table shows the eVscope 2, eVscope, and Vaonis Vespera in comparison with my current telescope tubes at the ASI224MC* and Atik Infinity:

 
Field of View
 
Telescope Reducer Focal Length Aperture ASI224MC Atik Infinity Remarks
PS 72/432 --- 432 72 0.65° x 0.48° 1.19° x 0.89° The largest FOV
C5 --- 1250 127 0.22° x 0.17° 0.41° x 0.31° FOV like C8 with reducer
C5 f/6.3 787.5 127 0.36° x 0.17° 0.65° x 0.49° FOV a little smaller as with TLAPO1027
C8 --- 2032 203 0.14° x 0.1° 0.25° x 0.19° The smallest FOV
C8 f/6.3 1280 203 0.22° x 0.16° 0.4° x 0.3° FOV like C5
TLAPO1027 --- 714 102 0.39° x 0.29° 0.72° x 0.54° FOV a little larger than for C5 with reducer
        in Degrees in Minutes  
eVscope --- 450 114 0.61° x 0.46 36.7' x 27.6' Same sensor as ASI224: Sony IMX224
eVscope 2 --- 450 114 0.78° x 0.57°* 47' x 34' *New sensor: Sony IMX347
Vespera   50 200 1.5° x 0.9°** 90' x 54' (ca.) ** New sensor: Sony IMX462

*) No longer in my possession (I bought an ASI294MC instead, having four times the FOV)

Image Size (Pixels)

Sony's IMX347 sensor can be used with different pixel numbers; 2688 x 1520 pixels are recommended by Sony; 2712 x 1538 effective pixels are the maximum possible.

Unistellar has opted for the following image formats:

The eVscope 2 uses the same app as the original eVscope and the eVscope eQuinox, which was upgraded to version 2 in summer 2022.

 

Visited Sky Objects

In preparation

For more objects, see page My Deep Sky Observations with the eVscope 2 (Complete List of Observed DSO)

Note: In order to avoid redundancy and double work, I will move the list of visited sky objects to that page some day in the future...

 

How To Observe with the eVscope 2

Page Observation in Brief offers instructions for using the eVscope. They can be easily transferred to the eVscope 2.

 

First Experiences

Observations

For space reasons, I will defer my first observation experiences to an extra page. See page First Experiences for more information. In preparation

 

Photo Attempts

See page First Experiences. In preparation

 

First Conclusions

In preparation

Foreword

Since I was not satisfied with the results of my new eVscope 2, Unistellar offered to check and possibly repair my eVscope 2. So, I sent it to Unistellar on February 14, 2022 and received information on February 18, 2022 that my eVscope 2 had been repaired and will be returned to me. When asked, I was told that there was a problem with the primary mirror, which was slightly under tension and therefore produced blurry images. As proof of the repair, I received a photo of Alnilam, which was taken with my eVscope 2 after the repair. It looks much better than my similar photo of Alnitak (near the Flame Nebula).

I describe my subsequent tests with the repaired eVscope 2 on the pages First Experiences (After Repair - Part 1) and First Experiences (After Repair - Part 2). According to this, the repair resulted in an improvement, but did not completely eliminate the mirror tension. Unistellar therefore offered me to return my eVscope 2 (end of March 2022) and exchange it for a new one, which arrived on April 8, 2022. See page First Experiences for early information. Because it suffered from the same issues, I sent it for repair to Unistellar at the beginning of May 2022. After inspection, Unistellar offered to send me another new one and offered to send me photos taken with it beforehand for evaluation. This has happened, and I will receive my third new sample of the eVscope 2 in August 2022.

 

Links

 

Appendix: Data for the Unistellar eVscope 2

Hardware

Bag

Electronics

Smarts

Sensor Data

Backpack Features

Carefully designed with the world-leading manufacturer of large telephoto lens transportation bags, the eVscope backpack is made of tough reinforced fabric, and carefully padded with high-density foam to protect your telescope from any shock.

The ideal accessory to take full advantage of the eVscope’s portability. (Source: Unistellar Help Center)

 

Appendix 2: eVscope 2 vs. eVscope Equinox and vs. the Original eVscope

The differences between the models (the original eVscope is no longer available) are described in the table below (from Unistellar Help Center: eQuinox VS eVscope 1.0 VS eVscope 2), to which I added some information:

Specifications eQuinox eVscope 1 eVscope 2
Battery Life up to 12h
(no eyepiece)
up to 10h up to 10h
µSD Storage Capacity 64GB 16GB 64GB
Display --- OLED screen OLED screen
HARDWARE
Optical Magnification: 50x
Digital Magnification: up to 400x (150x recommended maximum)
Field of View 27 arcmin x 37 arcmin 27 arcmin x 37 arcmin 34 arcmin x 47 arcmin
Max Magnitude: <16 in the medium quality night sky in under a minute, up to 18 in excellent conditions in a few minutes
Resolving Power (Image Scale) 1.72 arcsec 1.72 arcsec 1.33 arcsec
Mirror Diameter: 4.5"
Focal Length: 450 mm
Motorized Alt-Az Mount with extreme tracking accuracy thanks to Automated Celestial Tracking with Feedback
Weight: 19.8 lbs (9 kg) including tripod
ELECTRONICS
Sensor Technology: Sony Exmor with NIR technology
Sensor Model IMX224 IMX224 IMX347
Pixel Size 3.75 x 3.75 µm 3.75 x 3.75 µm 2.9 x 2.9 µm
Pixels 1280 x 960 1280 x 960 2048 x 1536
Megapixels approx. 1.23** approx. 1.23** approx. 4.09**
eVscope Pixels in EV Mode (since app version 1.3/1.4) 2560 x 1920 2560 x 1920 3200 * 2400
eVscope Megapixels in EV Mode (since App Version 1.3/1.4) 4.9* 4.9* 7.7*

*) according to Unistellar; **) according to Sony; more on the eVscope on page Unistellar eVscope - Information (4.5" Newton)!

 

Appendix 3: Published and Sent Photos, Comparisons with the Original eVscope

Since I do not yet own the eVscope 2 and therefore cannot present any photos of my own, I present photos on this page that Unistellar has published on their Website (eVscope 2 product page) so far, or photos that Unistellar sent me on request. The published photos are reduced in size and partly cropped, the sent ones are, except for the moon, in their original format (the large versions). I do neither know, whether these photos were post-processed, nor how long they were exposed (dwell time in EV or LV mode).

Published

   
    

Bubble Nebula NGC 7635

 

NGC 891

    

Moon

 

Helix Nebula

Sent

   
 

Moon

 

M 33 (Original: 3200 x 2400)

   
   

M 33 (processed; original: 3200 x 2400)

    

Saturn (original: 2048 x 1536)

 

Jupiter (original: 2048 x 1536)

New in November 2021

   
 

M 16 (Eagle Nebula)

 

Sculptor Galaxy

 

Tarantula Nebula

 

Triangulum Galaxy

Comparisons with the Original eVscope

The photos that were taken with the original eVscope, were taken by me and are post-processed.

eVscope 2

 

eVscope

    

Bubble Nebula NGC 7635

 

Bubble Nebula NGC 7635 (processed)

 

NGC 891

 

NGC 891 (processed)

    

Moon

 

Moon (processed and sharpened)

 

Moon

 

Moon (processed and sharpened)

    

M 33 (original: 3200 x 2400)

 

M 33 (processed)

 

M 33 (processed; original: 3200 x 2400)

 

M 33 << eVscope 2

 

M 16 (Eagle Nebula)

 

M 16 (Eagle Nebula)

 

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12.08.2022