Macro with the G7X : magnification

krugman wrote:

This is very helpful. Let me ask a few questions to make it even more helpful:

1. What is "CPL"?

2. How did you get the +4 diopter to adhere to, or attach to, the lens of the G7X? What are the "third party solutions" that you used?

3. How sharp were the results for the smallest object (c.31mm) with the +4 diopter lens? Was it sharp enough to use it to digitize slides?

We are very interested your results and would like to try this ourselves, but we need your help in telling us what you did and how you did it, in a bit more detail, and how well it worked in terms of

sharpness.

Thanks,

Krugman

CPL stands for Circular Polarizer filter. See Wikipedia or CambridgeInColor for details. Very helpful : much more than corner sharpness for the impact of an image.

I attach filters with the Magfilteradapter ring. There is also the cheaper Lensmate system, depending on your own needs.

About sharpness, I cannot tell with the G7X because actually, I performed very quick tests only to measure size objects, with a very little care about sharpness, and handled. Needless to say that with a light camera such as the G7X and a +10 filter of the longer FL, you need very steady hands !

But in general, such filters work well and retain a good amount of sharpness. Even with very basic filters, one can achieve very decent results. Kurt Munger studied close-up cheap kits. The filters I own are Hoya HMC Close-up +4 and Hoya 55mm Macro Close-up +10.

Not sure whether a compact camera with such filters can rival a scanner for films or slides. But for sure, you would need a way to handle the film and the camera so that nothing moves, and I don't own such a thing. Indeed, to make sure that everything is in focus, depending on the lens field curvature, you might need to close the lens and lower the shutter speed.

Note : the 31mm size is with the +10 diopters filter, not the +4. And it is on the full tele end. In such a situation, you will undoubtly need a solid tripod or such.