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Optar 135 Filter Thread

 
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bosseyedoldbat



Joined: 08 Jun 2004
Posts: 4
Location: Canada/ sw Ontario

PostPosted: Tue Jun 08, 2004 5:44 pm    Post subject: Reply with quote

Hi, there..... I'm new to the Graflex game, having just purchased a Crown Graphic with Kalart rf,presumably making it early 50s). My new toy has an Optar 135/f4.7 lens s/n 917464, and I would like to fit a step-up ring so that I can use my 52 mm filters. The filter thread on the optar appears to be about 36mm....... can anyone confirm this for me.... thanks
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Rangemaster



Joined: 06 Jul 2001
Posts: 412
Location: Montana, Glacier National Park

PostPosted: Tue Jun 08, 2004 6:20 pm    Post subject: Reply with quote

Actually, all of my 135mm optars have been series 6, and I have had to use a series 6 slip on filter holder and then a step up ring to get to the filter size I needed.


Dave
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t.r.sanford



Joined: 10 Nov 2003
Posts: 812
Location: East Coast (Long Island)

PostPosted: Tue Jun 08, 2004 6:45 pm    Post subject: Reply with quote

The adapter ring commonly used with 135mm. f:4.7 "Optar" and "Raptar" lenses, four and a half decades ago, was a Series VI size that slipped over the lens's front flange and was held in place with a setscrew; I believe Kodak manufactured it. The slip-on kind from Enteco and others also can be used. I've not seen a screw-in model, but I don't rule out the possibility that such a thing exists.
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45PSS



Joined: 28 Sep 2001
Posts: 4081
Location: Mid Peninsula, Ca.

PostPosted: Tue Jun 08, 2004 7:34 pm    Post subject: Reply with quote

A 38mm series VI (6) should be the ticket.

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bosseyedoldbat



Joined: 08 Jun 2004
Posts: 4
Location: Canada/ sw Ontario

PostPosted: Tue Jun 08, 2004 8:18 pm    Post subject: Reply with quote

hmmmm.... I'd never heard of a "no 6 slip on filter holder", but then I'd never heard of "bay 1" stuff either till I got my Rollei and Yashicamat! Now to find one..... thanks for the replies
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Henry



Joined: 09 May 2001
Posts: 1646
Location: Allentown, Pennsylvania

PostPosted: Tue Jun 08, 2004 8:21 pm    Post subject: Reply with quote

Correct as to 38mm = 1-1/2" series VI slip ring for the 135 Optar. There are no usable threads on the front element---those visible are only for the lens optics.

There's a step ring thread going over on the Accessories Help forum. See http://graflex.org/helpboard/viewtopic.php?topic=1891&forum=12&14
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troublemaker



Joined: 24 Nov 2003
Posts: 715
Location: So Cal

PostPosted: Tue Jun 08, 2004 8:24 pm    Post subject: Reply with quote

The Kodak slip on is 38mm, or 1-1/2".
I aquired a 44-55mm step up that will thread into the series VI without damaging the threads. However, 44mm is not very common, and stacking adapters makes quite an air space between the glasses. One may prefer to aquire a nice set of Wratten or other series VI filters and may well find them with the lens hood that also serves as a retaining ring. Search the auction sites for VI, or series VI etc.
Depending on your exposure times, it is simple enough to handhold the filter over the lens with your fingers and just shade the face of the lens with your body or whatever (this being with a tripod employed).
Good luck,
Stephen
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Sjixxxy



Joined: 27 Apr 2004
Posts: 109
Location: Midwest US

PostPosted: Tue Jun 08, 2004 8:36 pm    Post subject: Reply with quote

I solved this problem with my 135 Raptars by using my Nikon BR2A reversal ring that I have for my 35mm rig, and some self adhesive velcro. The inner diameter of the ring was juts a few mms larger then the size of the lens, so I cut some strips of the soft part of the velcro strips and ran it along the inside. It holds tight, and alows me to easily rotate the whole filter stack that I have on the lens, which means I can buy a regular polarizer and convert it into a single ring "thin" polarizer.

I image this set-up would work if you happen to come across a step-up ring that is just a little to big for the lens.
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Rangemaster



Joined: 06 Jul 2001
Posts: 412
Location: Montana, Glacier National Park

PostPosted: Tue Jun 08, 2004 9:22 pm    Post subject: Reply with quote

I have for years been taking the rings out of rubber lens hoods and building a gaffer tape ring around the end of the lens until I can screw the threaded ring onto the lens, this has proved very successful for me and allowed me to use standard filters on most of my lenses.

Dave
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bosseyedoldbat



Joined: 08 Jun 2004
Posts: 4
Location: Canada/ sw Ontario

PostPosted: Tue Jun 08, 2004 10:45 pm    Post subject: Reply with quote

the idea of using a cheapy rubber hood as a basis sounds really good...... I've got a couple the right size so I'm going to give that a go. Thanks again.... just shows you're never too old to learn, although with the heat today, I'm getting there!
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