Hello,
Recently I bought TS Maxfield 0.95x coma corrector for my 130PDS newt.
It seemed like the best budget option for my setup, that would give me satisfactory results.
Additionally I got a bit lucky to find mentioned cc, open-box on sale on Telescope express at small discount.
The issue that I'm having is at 55mm back focus (recommended by manufacturer) I get massive over correction of coma.
The optical train is Nikon D3500 (46.5mm for all F-mount Nikons), T2 adapter (8.5mm) for Nikon (adding up to 55mm total from sensor to cc).
From that point of 55mm back focus, adding space gradually all the way until I couldn't reach focus coma remained over corrected.
And at no point did I encounter under correction (even under 55mm of back focus).
Keep in mind focus position shouldn't change much with this cc, as far as I understood it from description.
I hope that I can resolve this, is it a faulty unit?
I doesn't feel right that the over correction is so big at 55mm.
Hopefully someone with experience can help me decide how to proceed.
I'm very sad/frustrated with fighting the equipment.
Thank you for reading, hope you are having a great day and thanks in advance.
Here's the raw frame: https://drive.google.com/file/d/1jPCy5R834sd0GgIP52QzzYSZ4MsdjvTF/view?usp=sharing
Recently I bought TS Maxfield 0.95x coma corrector for my 130PDS newt.
It seemed like the best budget option for my setup, that would give me satisfactory results.
Additionally I got a bit lucky to find mentioned cc, open-box on sale on Telescope express at small discount.
The issue that I'm having is at 55mm back focus (recommended by manufacturer) I get massive over correction of coma.
The optical train is Nikon D3500 (46.5mm for all F-mount Nikons), T2 adapter (8.5mm) for Nikon (adding up to 55mm total from sensor to cc).
From that point of 55mm back focus, adding space gradually all the way until I couldn't reach focus coma remained over corrected.
And at no point did I encounter under correction (even under 55mm of back focus).
Keep in mind focus position shouldn't change much with this cc, as far as I understood it from description.
I hope that I can resolve this, is it a faulty unit?
I doesn't feel right that the over correction is so big at 55mm.
Hopefully someone with experience can help me decide how to proceed.
I'm very sad/frustrated with fighting the equipment.
Thank you for reading, hope you are having a great day and thanks in advance.
Here's the raw frame: https://drive.google.com/file/d/1jPCy5R834sd0GgIP52QzzYSZ4MsdjvTF/view?usp=sharing
