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2x magnification

Started 1 month ago | Discussions thread
Richard Dutton Contributing Member • Posts: 572
Re: 2x magnification

Yes you are going †o lose light whatever.

You should be able to get good image quality certainly in centre frame with a good achromat. The Nisi 58mm is easily available and is 5 dioptres. Use a step down ring 62 to 58. You should get near to 2:1 with that according to the calculators but in my experience they overestimate and probably 1.7:1 is nearer to what you will get.

The Raynox DCR-150 ( 4.8 dioptres ) and DCR-250 ( 8 dioptres ) have excellent image quality. They are three element designs I think. Lose yet more light.

Some other views using TC's instead here

Lots of other threads about getting higher mags from the 105 on this and other forums e.g. this thread

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