Jump to content


Cure for Achroitis?

Recommended Posts

Tried this question in a different thread, probably the wrong place for it, so I'll put it on it's own.

How to pretend that your car is one's Bentley analogy.

If one were to obtain a very poorly corrected Achro. scope, one would expect the images to be poor. However if one were to install a filter that only allowed a small range of light wavelengths through, such as a Ha filter, one could focus all the available light on one's chip. One would then be solvent and have images.

Might it work?

Captain Chaos

Link to comment
Share on other sites

There is, of course, a minus-violet filter, which helps with fringing. There is also a product called a Chromacorr, which corrects the colour correction issue, but is fairly expensive ($500 or so) but less expensive than buying an apo.

Link to comment
Share on other sites

I've got a Baader "Fringe Killer" filter which does a good job, I was wondering about using a really bad system like a single 4" f/1.2 lens that's lying about in the garage really. If there was to be only a tight sliver of spectrum it might work rather well, or not at all. The current problem is a tube for it and how to get a wide enough nosepiece on the webcam. Next question will be what (not) on earth to point it at if it does work.

Captain Chaos

Link to comment
Share on other sites

Create an account or sign in to comment

You need to be a member in order to leave a comment

Create an account

Sign up for a new account in our community. It's easy!

Register a new account

Sign in

Already have an account? Sign in here.

Sign In Now

  • Recently Browsing   0 members

    No registered users viewing this page.

  • Create New...

Important Information

We have placed cookies on your device to help make this website better. You can adjust your cookie settings, otherwise we'll assume you're okay to continue. By using this site, you agree to our Terms of Use.