Metabones EF to M speedbooster

Mt Spokane Photography

I post too Much on Here!!
Mar 25, 2011
15,235
527
I'd certainly have to have a serious need to pay that. You are getting well towards the price of a RP which will use EF lenses and gather lots of light.
 
Reactions: AlanF

AlanF

5DSR
Aug 16, 2012
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I'd certainly have to have a serious need to pay that. You are getting well towards the price of a RP which will use EF lenses and gather lots of light.
Agreed. For my purposes of needing resolution from telephotos, putting a 1.4x speedbooster on, for example, a 400mm will reduce its focal length to 285mm giving an f-number of 2.8. That will not give any better resolution than having it native at 400mm on an RP at f/4 and no advantage in shutter speed as I can use double the iso on the RP because of the larger sized sensor, and the glass in the speedbooster will have some adverse effect.