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View Full Version here: : Orion field flattener test.

mill
02-07-2011, 11:41 AM
Hi all.

I have tested the new Orion field flattener for short refractors last night and it performs very well.
It needs 55mm of distance from the imaging chip and that was easy because i could just screw it on my QHY filter wheel (will make approx 55mm from the imaging chip of the QHY9).

First pic a crop of the left hand side top without the flattener and second pic the same crop but now with the flattener.
Judge for yourselfs and for $149 it is not bad at all :)
PS: pics are processed roughly :P
dcalleja
03-07-2011, 08:01 PM
Its a dramatic improvement. Bintel have them advertised for $259 though? Is it the same one?
mill
03-07-2011, 08:20 PM
Dan you are looking at the wrong one, it is in imaging and accessories on the fourth page bottom.
It is on the Bintel website.
dcalleja
03-07-2011, 10:30 PM
Got it thanks. it looks good for the price. Do you have any full frame examples?
mill
03-07-2011, 10:59 PM
first no flattener.
http://martinsastro.net/displayimage.php?album=8&pid=96#top_display_media

Next with flattener.
http://martinsastro.net/displayimage.php?album=8&pid=95#top_display_media
dcalleja
03-07-2011, 11:05 PM
Martin
Outstanding - many thanks. I'll be off to get one tomorrow. I have an SBIG 8300. The back focus is ~18mm but if I add a 35mm spacer it should be fine
falcoleprof
29-07-2011, 07:59 AM
Does the Orion flattener have filter threads ??? Even Orion where unable to answer it.
Poita
29-07-2011, 08:33 AM
Sorry for the noob question, I can see the quite stunning difference in the results, but how exactly does it do its magic?
mill
29-07-2011, 09:43 AM
I had a look in my flattener and it has filter threads.



It is just the glass in the corrector that is shaped in a certain way to make the field as flat as possible.
falcoleprof
29-07-2011, 10:54 AM
:lol:

I would have been kind of stupid on their part, but in the astrophotography world many things are not always logical.
Poita
29-07-2011, 07:22 PM
Thanks.
I found plenty to read on it here:
http://www.telescope-optics.net/field_flattener.htm

I am surprised just how much better the images look with the flattener, I wouldn't have expected it to be so huge, makes one kind of mandatory really.
dcalleja
30-07-2011, 04:48 PM
Yes - I have an Astronomik 2" filter on the front of my one.