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Skywatcher will be releasing a full frame reducer for esprit 120

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#1 sn2006gy

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Posted 14 November 2020 - 02:30 PM

I've been emailing skywatcher support back and forth to chase down some questions and they let me know that they have a reducer coming out for full frame at F 5.45 - so doing the math backwards it appears to be a .78x reducer or thereabouts.  Retail sometime in January around $380.00

 

I personally can't wait - not because i'm jumping into a full frame camera immediately, but the flexibility of being able to upgrade is nice but for me - picking off better star shapes with an OAG would be nice...

 

but more importantly - the backspacing - its supposed to be around 88-90mm backspacing. Means we can finally fit camera rotators on these scopes.  

 

Can't wait!!!


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#2 sn2006gy

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Posted 14 November 2020 - 02:30 PM

I only asked about the 120... i'd assume it would be similar for the 150 too


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#3 Jim Waters

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Posted 14 November 2020 - 03:16 PM

Any rumors on a FR/FF for the 100mm f/5.5?

 

Personally I would like to see a 1.3X increaser / flattener to extend the reach of the 100mm f/5.5 scope. 



#4 skyward_eyes

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Posted 14 November 2020 - 04:44 PM

They are 0.77x reducers for the Esprit 120 and 150. Each scope has a matched reducer.

We do not have anything for the smaller 80 and 100 at the moment. The ApexED would be the only options for reducers.

An extender for the 100 is interesting. I’ll pass that along.
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#5 drd715

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Posted 14 November 2020 - 10:42 PM

But what diameter and thread size?

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#6 skyward_eyes

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Posted 15 November 2020 - 10:06 AM

The reducers have two rear threads.

Their back focus is over 80mm for both. Actually closer to 90 so there is a spacer that’s threaded into the larger rear threads. This eats up the back focus to allow for our standard 55mm for DSLR using M48 threads. It also has a 2” filter mount on the back of the M48 adapter.

I don’t know what the larger threads are as my test samples are not production bodies just optics. I’ll have to check with the factory.

#7 sn2006gy

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Posted 15 November 2020 - 05:42 PM

Does the reducer fit inside the focuser or does it connect in the end?

#8 skyward_eyes

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Posted 15 November 2020 - 10:29 PM

It will thread onto the larger threads of the drawtube. Some of the optics will be inside the drawtube.

#9 Ken82

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Posted 16 November 2020 - 08:20 AM

Corrected imaging circle 34-36mm ?

#10 sl-he

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Posted 16 November 2020 - 09:11 AM

Corrected imaging circle 34-36mm ?

Most likely 43-44mm, like others for full frame



#11 skyward_eyes

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Posted 16 November 2020 - 09:28 AM

We cover the details on our webcast video. The 120 starts at 40 mins. https://m.youtube.co...h?v=jvxmqUyY5SA

The factory lists the image circle at 34mm but we tested it with a full frame and found it easily handled it. We believe the listed illuminated circle is for 100% illumination. In the video we also show a flat to better state the illuminated field.
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#12 njrusty

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Posted 17 November 2020 - 08:11 PM

Was going to purchase an FR now but will wait for this one for my Esprit 120!!!



#13 skyward_eyes

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Posted 17 November 2020 - 11:07 PM

If you are familiar with the Esprit line and their flatteners you know the field flattener has its listed back focus. We then include a spacer and a step down ring to M48 threads for easy mounting of popular DSLRs. This is going to be the same for the reducers.

The reducer has a longer listed back focus and the included a spacer to eat up the back focus to 55mm and an M48 step down ring for easy mounting of DSLRs.

For those with large format astronomical cameras that spacer and M48 step down can be removed giving you the full back focus of the reducer. Once the spacer is removed it opens the reducer to large M78x1 threads. Custom spacers will likely be needed for it allows for a large illuminated field.

#14 njrusty

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Posted 18 November 2020 - 12:21 PM

Available in Jan still???  Hopefully large enough order placed so we don't run out right away.



#15 skyward_eyes

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Posted 19 November 2020 - 10:09 AM

That’s correct. We are working on getting them up in the website in the next few weeks as our full production samples have arrived.
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#16 sl-he

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Posted 21 January 2021 - 02:24 PM

We cover the details on our webcast video. The 120 starts at 40 mins. https://m.youtube.co...h?v=jvxmqUyY5SA

The factory lists the image circle at 34mm but we tested it with a full frame and found it easily handled it. We believe the listed illuminated circle is for 100% illumination. In the video we also show a flat to better state the illuminated field.

Wondering what the stars in the corners look like on the FF sensor? Is there an owner of this full frame astro camera reducer on the forum?



#17 ris242

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Posted 21 January 2021 - 02:43 PM

Any rumors on a FR/FF for the 100mm f/5.5?

 

Personally I would like to see a 1.3X increaser / flattener to extend the reach of the 100mm f/5.5 scope. 

1.3x - buy a 120? grin.gif

 

if you want .65x and f/3.6

 

https://www.highpoin...ckId=3453213295



#18 barbarosa

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Posted 21 March 2021 - 04:48 PM

Hi Skyward Eyes-

 

Any on updates on when the 0.77x Reducer/Flattener for Esprit 120 will arrive at SW dealers in the US? 

 

Thanks.



#19 Joe G

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Posted 07 April 2021 - 02:41 PM

Bought the 0.77x reducer for the Esprit 150mm.  A big chunk of glass.

 

I must say it would be nice if these products came with M54 threads, or the option.  As full frame cameras have become more common, some products have standard M54 threads.  My Pegasus Falcon rotator and ZWO filter wheel have M54 threads.

 

Yes you can adapt M48 to M54 threads, but it gets tricky separating these adapters when they are snug tight.  And Precise Parts adapters get expensive.

 

At any rate, Kevin do you know the size of the threads pictured.  I'd like to get an adapter made that has M54 male threads and whatever the other threads are.  Seems close to 72mm?  The thickness seems to be 5mm.

 

Thanks for any help.

 

Joe

 

 

Attached Thumbnails

  • SW reducer.jpg


#20 skyward_eyes

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Posted 07 April 2021 - 04:32 PM

The inner male threads are M72x1 with a 5mm thickness on the ring. 

 

Many of our telescopes are designed to work with DSLRs, mirrorless cameras and many of the popular cameras on the market. Looking at the majority of the camera on the market M48 is much more universal than M54. If you need M54 the reality is you just need to get it machined for your needs, this is not uncommon as everything set up is unquiet. A $200 adapter is a small price to pay on a multi-thousand dollar system. Especially if that adapter is the key to getting things rolling. 

 

There are just too many combinations of equipment not days for companies to offer multiple adapters. 



#21 barbarosa

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Posted 09 April 2021 - 07:25 PM

UPS placed the reducer-flattener for my Esprit 120 gently by the door. It was well  packed by Cloud Break Optics and by a foam box inside  the SW box. Back focus is clearly indicated on the box.

 

Like the other fellow said, a serious chuck of glass. Memory is not always reliable but I think this is far more substantial than the Apex and unlike the Apex it does not require an adapter to bring it to focus.

 

M48 is fine for my setup. As it comes from the box the back focus is 55mm and ZWO was prescient and shipped the ASI 2600 with just the adapters needed for 55mm back focus.

 

I just now mounted it and took a quick look for any sign of vignetting. None seen. Another advantage over the Apex.

 

Whether I can get an image tonight is problematical. We had 90+ knot winds aloft last night that brought a stream of thin cloud on shore. The winds are still >90 knot, and forecast surface wind is 18 knot gusts. It could be the new gear curse will delay the first image. maybe It could be a while for the first image.


Edited by barbarosa, 09 April 2021 - 07:26 PM.



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