FS: Canon 40mm-Series VII adapter

[ChrisPlatt]

Canon 40mm to Series VII adapter

Fits 40mm thread Canon RF lenses

Separate retainer ring allows use of more common
Series VII threaded AND unthreaded filters

Price $10.00 includes First Class Mail
postage to USA in padded envelope.

 

[John Shriver]

Most commonly used to mount the matching round hood on the Canon 50/1.5 lens, which was the only Canon lens to have a 40mm thread but use a Series VII filter.

 

[back alley]

thanks for that bit of history john.

do you know why canon chose this route?

joe

 

[John Shriver]

The only hypothesis I can come up with the Series VII hood for the 50/1.5 was to prevent speed loss. Remember that the dress ring on the 50/1.5 is almost vertical. So perhaps using the Series VI based hoods on that lens leads to a tiny speed loss. (I think it's too close to the lens to ever cause anything visible as vignetting.) But I've examined it, and it sure is a very small infringement with Series VI as opposed to Series VII.

But, hey, when I'm using a hood, I'm outdoors, and I'm not going to use the 50/1.5 outdoors wide open. So I'd rather have the better protection of the rectangular 50/1.8 hood. Plus, it is superbly vented and angled.

I haven't actually used the "right" hood with my 50/1.5 yet, since there's a filter ring ding I need to have DAG remove. But, putting it on the 50/1.8, it's a viewfinder hog, on a IV-SB2 or a 7s. Well, only just a little worse than the round 50/1.8 hood (which I only use on the 35/2.8).

The 50/1.5 hood unfortunately is relatively rare, so it's very hard to catch at anything resembling a sane price.