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09-28-2010, 02:08 PM   #1
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Pentax 67 - Bayonet mount filters??

Hi, Everyone!

I've just started putting together a 67 outfit and scored some genuine Pentax 77mm filters, on the auction site, which I intended to use on my 120mm Soft lens.

But it turns out that the filters are bayonet mount and my lens only accepts a screw thread...

Does anyone know which lenses (generation of lenses?) will accept these bayonet mount filters or is it better to forget about them and go buy some Hoya screw threads, instead?

Steve.

09-28-2010, 04:31 PM   #2
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I have a couple of lenses which will take the bayonet filters. I'm pretty sure they are my old Takumars.
The glass in those filters is very good, and if they are SMC, then it is well worth trying to use them. One possibility would be to buy some inexpensive UV filters and trade out the glass.
The market for thos filters is going to be very small, it's hard to say if they will sell easily or not.
09-28-2010, 07:52 PM   #3
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I believe most all the 6x7 lens and generations will support a bayonet filter with the exception of some. Of my lens line up and generation, the following support bayonet filters:
  • SMC Pentax 6x7 45mm
  • SMC Pentax 67 75mm f4.5
  • S-M-C Takumar 90mm LS
  • SMC Pentax 6x7 90mm
  • SMC Pentax 67 105mm
  • SMC Pentax 67 165mm f2.8

The following do not:
  • SMC Pentax 67 55mm
  • SMC Pentax 67 165mm LS
  • SMC Pentax M* 300mm

There is a notch in the threads for the bayonet.

EDIT: Oops, make a mistake. The 67 generation of the 55mm does not support a bayonet

Last edited by tuco; 10-07-2010 at 02:04 PM. Reason: Oops, Revised List
09-29-2010, 02:08 AM   #4
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Thanks, guys, that's very helpful.

I intend to buy a 55mm, when a nice one comes along, so I'll hold on to the filters for now.

It's interesting that a camera system manufacturer, as renowned as Pentax, should not have continuity across it's lens range with regard to filter fitting, if not size.

I wonder if some of the lens barrels were supplied by a sub-contractor and someone just forgot to put the combination filter mount in the specs?

Anyway, another thing to watch out for when buying unseen!

I'm very much enjoying using my 67, by the way. Makes me regret not buying one years ago.

Good day, Everyone.

Steve.

09-29-2010, 07:21 AM   #5
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QuoteOriginally posted by Sinarman Quote
...
It's interesting that a camera system manufacturer, as renowned as Pentax, should not have continuity across it's lens range with regard to filter fitting, if not size.
...

Steve.
That is an issue for me sometimes since I shoot BW. When I go out with say a either a 45mm or 75mm plus a 105mm and 165mm, I need to carry three sets of color filters. The bulk adds up. I don't do stepper rings. And I'm always looking for long exposure shots and finding a 9 or 10 stop screw-on ND filter in 82mm is difficult. That is one reason I often take my Hasselblad instead of my 67. I only need one set for all three of the equivalent lenses for it.
09-29-2010, 07:36 PM   #6
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QuoteOriginally posted by tuco Quote
That is an issue for me sometimes since I shoot BW. When I go out with say a either a 45mm or 75mm plus a 105mm and 165mm, I need to carry three sets of color filters. The bulk adds up. I don't do stepper rings. And I'm always looking for long exposure shots and finding a 9 or 10 stop screw-on ND filter in 82mm is difficult. That is one reason I often take my Hasselblad instead of my 67. I only need one set for all three of the equivalent lenses for it.
The filter size thing had a lot to do with which lenses I bought.
I started with the 75, 105 and 135, with the intention of adding, down the road, the 45 and 200.
This kept the filter count down to 2 of everything. At some point along the way I added a 300/4, and both 90 and 165 leaf shutter lenses.

Until the 165 leaf came along, everything is either a 67mm or an 82mm, and for the 165 I step an 82mm down to it's 77mm.
You might want to look into a stepping ring rather than 77mm filters. It saved me a pile of money.
09-29-2010, 08:54 PM   #7
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QuoteOriginally posted by Wheatfield Quote
...
Until the 165 leaf came along, everything is either a 67mm or an 82mm, and for the 165 I step an 82mm down to it's 77mm.
You might want to look into a stepping ring rather than 77mm filters. It saved me a pile of money.
I started out with 67 and 77mm lenses. So, oops, too late. I don't have a complete set of all my usual color filters for 82mm though.
10-01-2010, 11:01 AM   #8
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Correction to my list of lenses supporting the bayonet. The 67 generation of the 55mm does not.

Maybe other people can look at their lenses and we can compile a list?

10-01-2010, 11:39 AM   #9
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Great idea, Tuco!

Add the lens that started this all to the list:

The SMC Pentax 67 120mm Soft accepts screw filters only.

Steve.
10-01-2010, 09:57 PM   #10
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45mm late version accepts 82mm bayonet filters.

M*400 accepts 67mm drop in filter internally and a screw in 112mm filter out front.

Two very recent lenses that were produced along with the 67II in 1998ish and later do not accept the bayonet filters:

100 Macro takes both 49mm screw filter and 77mm screw filter. 49mm affixes almost internally to a very narrow lens section. 77mm filters screw onto the front of the trumpet shaped shade...add a 77mm Canon 500D multi element diopter close-up lens to this macro with the Pentax multi element lifesize converter screwed onto the strange proprietary 49mm threads and you get beyond lifesize with really solid resolution...something very difficult to obtain in medium format. The telephoto version Canon close-up lens works because the trumpet shaped shade extends the front element out to telephoto distance.

M*300 takes an 82mm screw filter.

Tuco...I may have some 82 bayonet black and white filters tucked away. I did a sell-off a couple years ago but think I have a few left...I'll check for you.
10-03-2010, 04:26 PM   #11
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QuoteOriginally posted by Ron Boggs Quote
4
Tuco...I may have some 82 bayonet black and white filters tucked away. I did a sell-off a couple years ago but think I have a few left...I'll check for you.
I currently have a Pentax yellow (Y2) and orange (O2) in plus a screw on red (R25) in 82mm. I'd be looking for a green if you have one.
10-07-2010, 02:03 PM   #12
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I just picked up a SMC Pentax 67 165mm f2.8 and it supports the bayonet as well as the 6x7 generation of it.
10-08-2010, 01:41 PM   #13
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The 150 Super Takumar and 300 SMC Takumar both accept bayonet filters. The 200 Pentax, 600 Takumar and both zooms do not.
06-27-2011, 10:17 AM   #14
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Pentax 67 series cameras: lenses and filter sizes

I've a few 6x7, 67 lenses at home I'll post the info I have here when I get a moment. Perhaps there's a way to set up a spread sheet so we can mutually update the list with information based on lenses we have / own.

I write have/own because taking data from the web is sometimes erroneous.

Jn
12-08-2016, 04:29 AM - 1 Like   #15
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QuoteOriginally posted by Sinarman Quote
Hi, Everyone!

I've just started putting together a 67 outfit and scored some genuine Pentax 77mm filters, on the auction site, which I intended to use on my 120mm Soft lens.

But it turns out that the filters are bayonet mount and my lens only accepts a screw thread...

Does anyone know which lenses (generation of lenses?) will accept these bayonet mount filters or is it better to forget about them and go buy some Hoya screw threads, instead?

Steve.
Hi!

Here is the complete compatibility list: Pentax 67: Bayonet mount filters ? SKrasnov.com
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