Jump to content
Sign in to follow this  
JWNZ

Diopter for WA?

Recommended Posts

Hi there. Would you recommend I use a diopter with my Canon 16-35 f4 lens? I use it with either the Aquatica 9.5" glass dome or the 8" acrylic dome.

Any advice appreciated.

James.

Share this post


Link to post
Share on other sites

Check out the sea & sea internal correction lens

Share this post


Link to post
Share on other sites

You don't need a diopter for this lens, as it focuses close enough by itself. A diopter is used for WA if the lens can't focus close enough to focus on the virtual image formed by the dome which is about 3 dome radii away from the dome surface. If the lens can already focus on this a diopter does not help.

 

The S&S lens helps by bringing the corners into focus, the virtual image is curved and the corners are closer and you need to stop down to bring them into focus. The S&S lens helps by partly correcting this curved image so you dont need to stop down as much to bring the corners into focus.

  • Like 2

Share this post


Link to post
Share on other sites

Many thanks for the info guys, much appreciated.

Share this post


Link to post
Share on other sites
Sign in to follow this  

Sponsors

Advertisements



×
×
  • Create New...