Hi all,
I have been using my tak MT-160 for a while not with the 0.85x reducer. Even with the correct spacing (56mm) i still have bad coma issues. This raises the question, is it even a coma corrector at all or is it just a reducer?
I hope i don't have to buy a coma corrector (which also means i have to image at f6/1m instead of f5/0.75m)
Just to be SURE LOgan, the 56mm is from the rear metal of the reducer (NOT the threads, the surround of the reducer housing) to the SENSOR plane (not to the end of the adaptor).
A photo with your reducer in train would be ideal (of the euipment, not with it lol)
I also recall the state of the reducer as you received it...hardly ex-factory (memories of silicon and a weird plastic or shoddy made aluminium ring come to mind).
Are you accounting for the 4mm of the front T-adaptor as shown in the schematic? (or is this part removeable?) This will make it 10.5mm total just for the cam consideration, leaving you 45.5mm to account for from the T adaptor on the cam to the rear edge of the reducer
Question still stands - is it even a coma corrector?
"The dedicated reducer (f4.8) yields a perfectly flat field even on a 24mm dslr chip." - found that on the web. Tak reducers are traditionally reducer/flatteners. The corrected image circle with the reducer is 36mm - are you larger than that with your ZWO?
Can you show a picture of the inscribed label/data on the reducer please Logan - it may not be the right one