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  Previous versions of Samuli Vahonen's message #13929351 « Front-End Filter Improves Corner Smearing »

  

Samuli Vahonen
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Re: Front-End Filter Improves Corner Smearing


freaklikeme wrote:
Is anyone working on a solution for the ZM Distagon 18?

See p7 #14 and p18 #11.

I have not yet received rubber tools to remove retention ring from my B57 Proxars. So I had to duct tape the Hasselblad filter into front plate of ZM18. I have tested front filter solution with A7v2 and A7r thick filter stack cameras, and this doesn't do miracles, improves for sure but I don't think this will work good enough for landscapes. Results were good for close-ups. If interested I can share RAW-files from A7v2.

Also I removed both shims like instructed in p12 #2, but maximum focus distance is ~120cm (measured indoors, not 100% sure as yesterday outdoors 0C[for imperial people: water freezing point temperature, whatever that is in the F-scale] it seemed to focus somewhere between 150-200cm range). Ordered punch of cheap filter from eBay to later test if some of them would focus further.

PS. As this thread is so long and contains lots of off-topic discussion I made wiki-page containing link to pages where solution for each lens has been mentioned, OP has done similar summary to beginning of the thread:
wiki page of issues caused by thick filter stack

Samuli




Feb 20, 2017 at 01:10 AM





  Previous versions of Samuli Vahonen's message #13929351 « Front-End Filter Improves Corner Smearing »