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frebieAdministrator
Chief assistant to the assistant chief


Reged: 04/29/08

Loc: Neither here nor there.
New Astro-Tech 0.8x reducer/field flattener
      #5477223 - 10/18/12 03:24 PM Attachment (73 downloads)

The new Astro-Tech ATR8 2" 0.8x reducer/field flattener for f/6 refractors is now available from stock. Although designed primarily for use with the new Astro-Tech AT60EDT triplet apo refractor, and priced at only $119.95, the ATR8 will work well with any brand of apo or achromatic refractor with a 2" focuser and operating at a focal ratio of f/5.5 to f/7 or so.

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Mary B
Vendor - Echo Astronomy and Electronics
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Reged: 05/21/10

Loc: Minnesota
Re: New Astro-Tech 0.8x reducer/field flattener new [Re: frebie]
      #5477373 - 10/18/12 04:46 PM

Any news on one for the RC scopes?

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Ira
Carpal Tunnel
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Reged: 08/22/10

Loc: Mitzpe Ramon, Israel
Re: New Astro-Tech 0.8x reducer/field flattener new [Re: Mary B]
      #5477465 - 10/18/12 05:45 PM

Is this mainly for photographic use or does it apply to visual observers?

/Ira


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frebieAdministrator
Chief assistant to the assistant chief


Reged: 04/29/08

Loc: Neither here nor there.
Re: New Astro-Tech 0.8x reducer/field flattener new [Re: Mary B]
      #5477553 - 10/18/12 06:43 PM

Quote:

Any news on one for the RC scopes?




Nope. Different supplier.


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frebieAdministrator
Chief assistant to the assistant chief


Reged: 04/29/08

Loc: Neither here nor there.
Re: New Astro-Tech 0.8x reducer/field flattener new [Re: Ira]
      #5477566 - 10/18/12 07:00 PM

Quote:

Is this mainly for photographic use or does it apply to visual observers?

/Ira




Photographic. The image plane falls 55mm behind the shoulder of the reducer, the spacing between the front face of a T-ring and the image plane in a DSLR. There's no room for a diagonal and eyepiece and no easy way to attach them.


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tomo
professor emeritus
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Reged: 06/14/10

Loc: Shelby Twp, Mi
Re: New Astro-Tech 0.8x reducer/field flattener new [Re: frebie]
      #5487632 - 10/24/12 08:55 PM

I just picked mine up. It looks just like Orion's one but they don't say it flattens. Same?

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frebieAdministrator
Chief assistant to the assistant chief


Reged: 04/29/08

Loc: Neither here nor there.
Re: New Astro-Tech 0.8x reducer/field flattener new [Re: tomo]
      #5488454 - 10/25/12 11:36 AM

We don't know for sure if it is the same reducer, since we and Orion don't share ordering information. A lot of astronomy products look alike. What we do know is that the manufacturer has very specifically stated to us in writing -- twice -- that our 0.8x reducer, and I quote their email, "is also a flattener."

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WhitenerJ
professor emeritus


Reged: 02/06/12

Loc: Waxahachie, Texas
Re: New Astro-Tech 0.8x reducer/field flattener new [Re: frebie]
      #5500612 - 11/02/12 09:47 AM

I have an Orion EON 80mm which is F/6.25. Would this work well with it and also what would it drop my F/6.25 down to?

Jason


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frebieAdministrator
Chief assistant to the assistant chief


Reged: 04/29/08

Loc: Neither here nor there.
Re: New Astro-Tech 0.8x reducer/field flattener new [Re: WhitenerJ]
      #5500722 - 11/02/12 11:13 AM

It should work with no problems, as f/6.25 is in the right f/ratio wheelhouse, but we have not tried it with that particular scope so no promises. f/6.25 x 0.8 = f/5.

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Starrvue
newbie


Reged: 03/12/07

Re: New Astro-Tech 0.8x reducer/field flattener new [Re: frebie]
      #5629588 - 01/18/13 09:59 AM

Will this product support a DSLR full frame 35mm camera or is it only intended for the APS size camera?

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frebieAdministrator
Chief assistant to the assistant chief


Reged: 04/29/08

Loc: Neither here nor there.
Re: New Astro-Tech 0.8x reducer/field flattener new [Re: Starrvue]
      #5630108 - 01/18/13 03:22 PM

The image circle at the focal plane of the 0.8x reducer is 42mm. 35mm film has a 43.3mm diagonal and full frame DSLRs typically have a diagonal measurement of 43 to 43.3mm, depending on the manufacturer. There will be a very small amount of vignetting at the four corners of the image.

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Lightning
sage


Reged: 07/04/10

Loc: Canberra, Australia
Re: New Astro-Tech 0.8x reducer/field flattener new [Re: frebie]
      #5630994 - 01/19/13 02:30 AM

Funny... it looks absolutely identical bar the white type to my Williams Optics P-flat 88.

[Edit] Oops, it's clearly different.

Question: Which scope would this work with better, the AT65EDQ or the AT60EDT? Thanks in advance. [/EDIT]

Edited by Lightning (01/19/13 03:02 AM)


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frebieAdministrator
Chief assistant to the assistant chief


Reged: 04/29/08

Loc: Neither here nor there.
Re: New Astro-Tech 0.8x reducer/field flattener new [Re: Lightning]
      #5631391 - 01/19/13 11:33 AM

We haven't tried it the reducer with the 65EDQ, since the 65EDQ already has a built-in field flattener lens. The field-flattening function of the 0.8x reducer would probably simply undo the field-flattening effects of the scope's built-in flattener and recurve the already flat field.

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Lightning
sage


Reged: 07/04/10

Loc: Canberra, Australia
Re: New Astro-Tech 0.8x reducer/field flattener new [Re: frebie]
      #5632041 - 01/19/13 07:05 PM

It does look suspiciously similar to this though: http://www.bintel.com.au/Accessories/Reducers--Correctors--Flatteners/Orion-0...

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