field flattener and reducer for fcd100 102mm explore scientific apo

HST
18 Jul, 2018 18:39
hello every one
im considering to buy the fcd100 102mm explore scientific apo carbon fiber telescope and want to add a field flattener and reducer to this telescope.
i have a 650d canon dslr camera and wondering what kind of field flattener and reducer will be good for this setup… i saw on the internet couple of flattener/reducer and saw something for SV115 refractor and didnt know if it will be good for me…

STELLARVUE 0.8X REDUCER FLATTENER FOR SV115 WITH 3" FT FOCUSER

STELLARVUE 0.8X REDUCER FLATTENER FOR SV115 REFRACTORS WITH 2" FOCUSERS

STELLARVUE 0.8X REDUCER FLATTENER FOR F/7 REFRACTORS WITH 2" FOCUSERS

do you recommend for one of this or others?

thank you very much!!
kajouman
18 Jul, 2018 22:07
depends on your size of focusser..do you have 2 or 3 inch ?
HST
19 Jul, 2018 04:25
Well, i dont really sure. Im seeing people that are using 2 inch focal reducer flattener but in the website of explore scientific i read that this telescope have 2.5 inh hex foceser…
here is a link of the telescope
https://explorescientificusa.com/products/102mm-fcd100-air-spaced-triplet-in-carbon-fiber
Thank you very much!!
kajouman
19 Jul, 2018 06:47
its in the title……. with 2.5" HEX Focuser

it shall have a 2 "adapter whit it.

if you can  get the 2.5 inch..go for it..if not..the 2 inch.

3 inch wont fit.
HST
19 Jul, 2018 17:14
ok thanks!
do you have any recommendation?
maybe this?
https://optcorp.com/products/stellarvue-focal-reducer-field-flattener-for-svr102t-telescope-with-2pt5-focusers
i just dont know what are the best…
thank you!!
kajouman
19 Jul, 2018 22:41
well ,its a good  brand. stellarvue is real  good.

Maybe you can buy it ,whit the option to bring it back if its not  flatten enough.
HST
20 Jul, 2018 09:18
it is sound that stellarvue  is not very good…
do you have any other suggestions to better reducer/flattener? maybe a 2" with adapter?
thank you!
daniel.tackley
20 Jul, 2018 15:00
I have the Explore Scientific ED80 and use this field flattener (but it isn't also a focal reducer):

https://www.hotechusa.com/category-s/4.htm
huerbsch
20 Jul, 2018 17:14
WilliamOptics has a 0.8x reducer thats adjustable with threads so you can get the spacing just right. Its the Flat 6A II
huerbsch
20 Jul, 2018 17:16
https://williamoptics.com/new-adjustable-flat6a-t-mount-not-included
huerbsch
20 Jul, 2018 17:17
It threads directly onto the focuser, either M63 or M66 cant remember but should be in the details
HST
20 Jul, 2018 19:41
thanks! but i want to buy field flattener that it is also a reducer, to save some money… smile
so if i will get the william optics field flattener reducer with the canon t mount it will fit to the explore scientific? because i saw that it have 2" focuser…
thank you!!!!!!
zl4plm
23 Jul, 2018 01:00
I've been looking at just flatteners and found a couple on TS Optics too

https://www.teleskop-express.de/shop/product_info.php/language/en/info/p10264_TS-Optics-PHOTOLINE-1-0x-APO-Full-Frame-Size-Flattener-with-M68-connector.html

this should fit my Moonlight focus draw tube as well

similar

https://www.teleskop-express.de/shop/product_info.php/info/p2646_TS-Optics-PHOTOLINE-Full-Frame-APO-Corrector---Flattener-for-astrophotography.html
The flattener MUST screw on - I've experience all sorts of squinting when using FF/FR in EP's - I won't go that route again - it needs to firmly screw  in place to ensure it remains parallel
 
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