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I am new to astrophotography and am stil! looking to build up my equipment. I have an HEQ5 Pro to go mount and 200pcs Skywatcher OTA.
I want to primarily focus on DSO,s (pardon the pun)
I am thinking about my next purchase and am torn between a postmaster for accurate alignment or a guidescope.
Any advice would be greatly appreciated.
Hi Everyone, need a little help choosing the right flattener/reducer for the William Optics Zenithstar73.
I am after one that does both jobs so that rules out the dedicated Flat73 which is just a flattener!
So I was wondering if I could get away with the Flat6 0.8 reducer which does say it works on scopes 70 - 80mm f/6 but doesn't list the ZS73 in the models list or do I need to spend the extra and get the Flat6A11?
Can anyone shed some light on this have email 365 where I have seen the Flat6 but had no reply.
Thanks in advance.
FOR SALE: Borg 89ED refractor with 2” Feathertouch focuser.
The scope was purchased from Ian King Imaging in 2014. The scope has only been used occasionally and is in excellent condition as you can see from the photographs.
The scope works with both standard eyepieces and also binoviewers. To use eyepieces the draw tube is extended, to use binoviewers the draw-tube is left retracted. The focal length is 600mm and the focal ratio is f6.7
This sale includes:
#2588 89ED Objective Assembly (white) incl both end caps. #7050 80 Dia. 50mm Tube (white) #7150 80 Dia. 150mm Tube (white) #7137 Drawtube for 7150 #7753 Draw Tube Holder (white) #9795 FTF M68.8 Adapter 2” Feathertouch Focuser with 40mm of travel #7083 Tube ring set for 80mm tubes (white) #3125 125mm Vixen-compatible dovetail plate Baader #2457000 finder shoe All packaging/boxes can be seen in the photographs.
PRICE: NOW SOLD
Thanks for looking,
Two questions if I may.
1. Can the three screws marked by yellow arrows in the picture below be used to mount a second finder shoe on the C11 EDGE HD scope, permitting both a straight through and a right angle finder to be fitted?
2. The EDGE has field flattening optics inside; is the distance from the visual back to the chip critical, or by making adjustments to the position of the mirror to achieve focus on a chip say 250mm away from the visual back mean the field will still be flat at that distance?
I bought my first telescope last year (Celestron Nextar Evo 8), I've used it several times already and never had any problem with moving it/putting it together.
Last night I was out doing some photography with my scope and at one point my glove came in contact with the corrector plate. I noticed a small smudge when I came back in.
As it's my first scope I've tried to be very careful and got a little scared that it would affect the performance of it. Looking for a professional opinion on this. Does this need to be cleaned? Will it make a difference in my photography/visual?
Added two pictures.