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Canon Rangefinders - Peter Dechert and Peter Kitchingman Peter Dechert is best known for his Canon Rangefinder, Canon SLR, and Olympus Pen books, the latter two long out-of-print. He was a monthly columnist for many years for SHUTTERBUG magazine, and has contributed to many others. Most recently he has written about the pre-WW2 Zeiss 35mm cameras, but his interests in camera equipment and optics are many and varied. As a pro protographer and honorary life member of ASMP, Peter is also expert in using the gear! Peter Kitchingman - author of Canon Rangefinder Lens book Peter Kitchingman's 'Canon M39 Rangefinder Lenses 1939-71' book is the definitive source on these very interesting optics. His interests also go to the entire Canon Rangefinder system and beyond.

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How rare is an original Canon 40mm "SCREW LENSCAP -CHROME"
Old 12-12-2017   #1
JB-Dancer
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How rare is an original Canon 40mm "SCREW LENSCAP -CHROME"

I have just purchased an original Canon 40mm "SCREW" chrome lenscap and believe it to be a rare item.
Most of the original Canon lenscaps seem to be "push-fit".
Does anyone on the forum own one of these screw fit 40mm Canon lenscaps?.
I am hoping Peter Kitchingman might know if it is a rare item as it is the first that I have seen over many years.
Many Thanks,
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Old 12-24-2017   #2
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Quote:
Originally Posted by JB-Dancer View Post
I have just purchased an original Canon 40mm "SCREW" chrome lenscap and believe it to be a rare item.
Most of the original Canon lenscaps seem to be "push-fit".
Does anyone on the forum own one of these screw fit 40mm Canon lenscaps?.
I am hoping Peter Kitchingman might know if it is a rare item as it is the first that I have seen over many years.
Many Thanks,
Hi

These are SUPER RARE and to date I think only came in three sizes .

I own two which the largest size being 57.59mm and the small one measuring 39.84mm.

The small one has the early "C" as in the company name CANON while the larger example has the later "C" with the serif in the letter C.

As I mentioned they are rare and the reason is that it was easier to push-on a lens cap rather the screw it on.

What size is yours?

I did do an article on these in my now defunct web page about these lens caps but cannot find it at the moment.
Cheers Peter
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Old 12-24-2017   #3
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Hello Peter,
The lens cap diameter measures 42mm and fits the Canon lenses with 40mm screw filter threads
(e.g 50mm f1.8 / 50mm F1.5 / 35mm f2 / 100mm f3.5)
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Old 06-24-2018   #4
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Hello Peter,
I have just recently found your article on these "screw lenscaps" on your website Blog.
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Old 06-24-2018   #5
raid
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Does “Rare” mean valuable? It is a lens cover.
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Old 06-24-2018   #6
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It probably is more valuable than 42mm Jupiter-8 lens caps you can get for $7 shipped that fit Canon lenses great.
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Old 06-24-2018   #7
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Quote:
Originally Posted by raid View Post
Does “Rare” mean valuable? It is a lens cover.
Yes, "rare" does mean valuable, no matter what the item, when a) someone has never heard of it, read about it, or seen it, or otherwise known about it, and b) someone has the item and another person seeks it.
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Old 06-24-2018   #8
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Are we talking about a $1000 lens cap, say?
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Old 06-24-2018   #9
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Depends on the collector I guess. $1,000 seems high, but who knows?

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Old 06-24-2018   #10
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When I bought my Canon 28mm f/2.8 (S-Mount / LTM) it came with the 40 mm screw lens cap (same as pictured in the original post). There didn't seem to be any extra expense due to the lens cap. Can't remember the cost but it was very reasonable... This was something like 12-15 years ago purchased at Map Camera in Tokyo...
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Old 06-26-2018   #11
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Quote:
Originally Posted by raid View Post
Are we talking about a $1000 lens cap, say?
I did hear that the Hermes Edition Leica 35mm Summilux push on metal cap with the thin Leica script is priced somewhere in this region. I was totally gobsmacked, but apparently it was gone in a flash. Never saw the cap sold separately from the set again.

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Old 06-26-2018   #12
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42mm cap on the Canon 50mm f/1.5 LTM (40mm filter thread)
50mm cap on the Canon 135mm f/3.5 LTM (48mm filter thread)
60mm cap on the Canon 85mm f/1.5 LTM (58mm filter thread)

Still missing the 36mm cap.......


And here is a reference for the two typography on the cap that Peter Kitchingman referenced in his blog article.

Early type


Late type. Note that the letter "a" is now a flat top.


To be honest, I would not use these caps. Quite a hassle and it does not allow me to use the slim filters that I am very fond of.

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