when do you know you want 2" filters instead of 1 1/4

[iwols]

just a thought any comments welcome thanks

[barbulo]

To avoid vigneting? This tool might help.

[Nik271]

When you have a big sensor, 1.25inch opening does not illuminate a full frame sensor for example.

[alacant]

Hi

If the filters are as close to the sensor as possible, you'll know you need to go bigger when they're blocking so much light that flat frames fail to correct the field.

Cheers

Edited January 10, 2023 by alacant

[900SL]

You can also get 31mm and 36mm filters..

Edited January 11, 2023 by 900SL

[Figgis]

Hello All.

              I put a 1¼" IR Cut right on the nosepiece of my little ZWO 462, should I be moving it up the image train closer to the focuser?

[alacant]

1 hour ago, Figgis said:

should I be moving it up the image train closer to the focuser?

Hi

What issue is it causing where it is currently positioned?

[Figgis]

No issues, just asking if here is the best location for it.

[AstroMuni]

On 12/01/2023 at 12:22, Figgis said:

No issues, just asking if here is the best location for it.

As close to the sensor as possible