Jump to content
Sign in to follow this  
Daniel81

Does 72 mm Filter Interfere with 120 S Infinity Focus?

Recommended Posts

Advertisement (gone after registration)

Does a 72 mm lens filter on the front of the APO S Summarit 120 lens interfere with full retraction of the lens to infinity focus in any way?

Why does the lens also have a larger diameter thread edge on the front end at all?

Share this post


Link to post
Share on other sites
11 minutes ago, Daniel81 said:

Does a 72 mm lens filter on the front of the APO S Summarit 120 lens interfere with full retraction of the lens to infinity focus in any way?

Why does the lens also have a larger diameter thread edge on the front end at all?

A filter on the lens does not interfere with focus. If you use a filter system, such as Lee Filters, you will need a clear filter (or just a ring) on the lens so that it can focus at infinity.

Share this post


Link to post
Share on other sites

Daniel81,   Here is a direct quote from Red Dot Forum, written by David Farkas, owner of the Leica Store Miami and his explanation of the S 120 lens and filters.  You can also follow the link and article to near the end and read more there.  

"One final cautionary note is that the 120mm APO-Macro has a somewhat quirky filter design. First, in addition to the correct 72mm filter threading on the front of the lens, there is also an 82mm filter thread on the outer barrel. Because the lens is not internal focusing, the inner barrel moves inside the wider outer part at infinity and past it for closer focus. This causes two issues. If you want to use a 4″ filter holder, you will need to add a spacer ring in order to achieve infinity focus. I typically take a cheap no-name 72mm filter and knock out the glass. The other concern is that if you make the mistake of mounting an 82mm filter on the outer barrel and go to focus, you might end up with a bit a of mess, with the inner part smashing through the filter."  

https://www.reddotforum.com/content/2020/04/the-definitive-guide-to-leica-s-lenses/ 

Personally, I use the Cokin 72mm Extension Ring on my S120.  Hope this helps.  r/ Mark

Share this post


Link to post
Share on other sites

Just use adapter rings (72 ->77 & 77->82mm). You can then use the same 82mm filters and lens caps than on the other S lenses (the adapter rings do not interfere with the inner barrel move). This is my solution since day 1 with the 120mm. 

Share this post


Link to post
Share on other sites

Join the conversation

You can post now and register later. If you have an account, sign in now to post with your account.
Note: Your post will require moderator approval before it will be visible.

Guest
Reply to this topic...

×   Pasted as rich text.   Paste as plain text instead

  Only 75 emoji are allowed.

×   Your link has been automatically embedded.   Display as a link instead

×   Your previous content has been restored.   Clear editor

×   You cannot paste images directly. Upload or insert images from URL.

Loading...
Sign in to follow this  

  • Recently Browsing   0 members

    No registered users viewing this page.

×
×
  • Create New...

Important Information

By using this site, you agree to our Terms of Use. 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., Read more about our Privacy Policy