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06-11-2009, 08:51 PM   #1
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Stupid question about filter size

Just got a Vivitar 200/3.5 in TX mount (very solid lens, by the way) and I'm really not sure what filter size is! I'm sure it's between 62mm and 72mm (tried lens caps from other lenses) - and I am pretty sure there's only 67mm in between those sizes - but I'll ask just in case - am I right?

06-12-2009, 06:41 AM   #2
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It should be a 67mm. You can measure it with a ruler.
06-12-2009, 07:43 AM   #3
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QuoteOriginally posted by Wheatfield Quote
It should be a 67mm. You can measure it with a ruler.

Unfortunately, you dont find metric rulers everywhere in the U.S.A.
06-12-2009, 08:50 AM   #4
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QuoteOriginally posted by flyer Quote
Unfortunately, you dont find metric rulers everywhere in the U.S.A.
But you can find metric conversion tables anywhere on the internet.

06-12-2009, 09:05 AM   #5
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Doesn't the lens cap have the size stamped on it???
06-12-2009, 10:59 AM   #6
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Everyone should have a caliper such as this one:



More of them here.

They are not that expensive, yet are of trememdous help in acurate measuring.

I have 6 of them, ranging from 4" to 12". Some are duplicates, one in the garage, one on my desk.

My local Harborfreight store has them on half-price sale every other week.
06-12-2009, 11:26 AM   #7
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Funny thing, I couldn't find my ruler - bought it and never used it... And I really don't think I need a caliper so accurate - just no need for me.
06-12-2009, 11:48 AM   #8
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Conversion

67mm is just a tad more than 2 5/8 inches.

The conversion is easy. One inch is equal to approximately 25.4mm.

06-12-2009, 12:00 PM   #9
pbo
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I know that I grew up in Europe, and I'm still using millimeters I'm not really used to feet/inches and stuff - so whenever I see those, I just google the value
06-12-2009, 01:52 PM   #10
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QuoteOriginally posted by SOldBear Quote
Everyone should have a caliper such as this one:



More of them here.

They are not that expensive, yet are of trememdous help in acurate measuring.

I have 6 of them, ranging from 4" to 12". Some are duplicates, one in the garage, one on my desk.

My local Harborfreight store has them on half-price sale every other week.
How accurate can they really be? They are from Harbor Freight afterall!.

(runs and hides from the fallout)
06-12-2009, 03:12 PM   #11
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QuoteOriginally posted by graphicgr8s Quote
How accurate can they really be? They are from Harbor Freight afterall!.

(runs and hides from the fallout)
Maybe not sufficient for a machine shop making parts for NASA, but more than enough for a woodworking (my other hobby) homeshop and for general use. They are more accurate than my handcut dovetails.

I have a few Starrett and Mitutoyo measurement tools, but don't use them everyday. I wouldn't bring them along to the lumber yard. They are used mainly to check and calibrate things like this caliper from Harbor Freight (and for showing off to my fellow woodworkers )
06-12-2009, 03:37 PM   #12
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QuoteOriginally posted by SOldBear Quote
...They are more accurate than my handcut dovetails...
I am hoping the new Veritas dovetail saw makes me better at dovetails.

Interesting that the 200/3.5 TX would be 67mm; the Komine M42 mount is 62mm.
06-12-2009, 09:34 PM   #13
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QuoteQuote:
Interesting that the 200/3.5 TX would be 67mm; the Komine M42 mount is 62mm.
Well, the lens is big and hefty, it even has a tripod collar. From pictures I've seen of other non-TX versions of this lens, I kinda think it looks more... solid. With this hood I picked up from ebay, it's gonna be a monster
I think they should sell more of those deep hoods for more sizes - usually what they have are too shallow even if they are "for telephoto lenses".
06-13-2009, 03:52 AM   #14
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QuoteOriginally posted by flyer Quote
Unfortunately, you dont find metric rulers everywhere in the U.S.A.
I haven't seen a ruler without metric markings in the US since I was in high school decades ago. Maybe grade school.

Ever since the government's failed attempt to force the people to convert to the metric system every ruler I've used has had both inch and metric markings.

I'm sure you can find rulers in the US without metric markings, but I'll bet they are over 40 years old and considered by some to be collectors items.
06-14-2009, 11:29 PM   #15
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I have the K-mount version of the Vivitar 200mm f/3.5 from another member and it uses a 62mm filter thread.
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