[ivanvernon]

I just got my first leaf shutter (LS) lens, the Pentax-67 165mm f 4.0 LS. I need advice and assistance on using it. Specifically, I need to know what kind of sync cord to purchase in order to connect the lens to the flash unit.

[Adam]

Are you using it on the 6x7 body?

[ivanvernon]

Adam, thanks for answering. Actually, I am using it on the K-1. ivan

[wombat2go]

I use a cable with a pc socket on one end and a hot shoe with 1/4 20 mount on the other ( I have the 6x7 90 LS)
https://app.box.com/s/44lzyxxte8c3v1ipj2kj

[gofour3]

I just got my first leaf shutter (LS) lens, the Pentax-67 165mm f 4.0 LS. I need advice and assistance on using it. Specifically, I need to know what kind of sync cord to purchase in order to connect the lens to the flash unit.

Warning the manual for the Pentax 67 165/4 LS lens states that if you are using the K-Mount to 6x7 adapter you cannot use the LS function on this lens, the 165/4 lens will only work in the focal-plane shutter mode.

Phil.

[ivanvernon]

Warning the manual for the Pentax 67 165/4 LS lens states that if you are using the K-Mount to 6x7 adapter you cannot use the LS function on this lens, the 165/4 lens will only work in the focal-plane shutter mode.

Phil.

I think you are on to something. I found the right connector by using an old Sunpak 522 vintage flash, but LS exposures do not seem possible.

---------- Post added 08-15-17 at 08:07 PM ----------

I use a cable with a pc socket on one end and a hot shoe with 1/4 20 mount on the other ( I have the 6x7 90 LS)
https://app.box.com/s/44lzyxxte8c3v1ipj2kj

So you are using the 165LS on one of the Pentax 67 camera versions? Or have you been able to use it with an adapter on either the 645D/Z or K-mount?

[gofour3]

As far as I know neither Pentax 67 LS lenses will work in the LS mode with anything between the camera and lens. This includes extensions tubes, rear converters, both the 645 to 6x7 & the K-Mount to 6x7 adapters.

The manual for the 6x7 to K-Mount adapter also states this.

Phil.

---

Last edited by gofour3; 08-15-2017 at 05:57 PM. Reason: Correction

[wombat2go]

I think you are on to something. I found the right connector by using an old Sunpak 522 vintage flash, but LS exposures do not seem possible.

---------- Post added 08-15-17 at 08:07 PM ----------


So you are using the 165LS on one of the Pentax 67 camera versions? Or have you been able to use it with an adapter on either the 645D/Z or K-mount?

Hi Ivan,
I have the 6x7 90 LS. In year 2012 I made my own 6x7 adaptor for that lens on the lathe, for a metal box camera I built.
I have made other 6x7 adaptors for the ordinary ( non leaf shutter or barrel ) Takumar 6x7 lenses for use on the Speed Graphic.

The 6x7 leaf shutter lenses ( there were only the 90 and 165) require an adaptor with one additional feature, compared to the barrel lenses.
I recall I have described or discussed the details on PF possibly with photos of the adaptor maybe in 2012 or 2013.
That additional feature ( I recall) holds the aperture wide open and i don't want to open my camera to check that tonight.

Then the lens is autonomous , it will switch the rear knurl to "AUTO" and the controls on the front of the lens will work as follows:
looking forward from back of camera:

First ensure the firing knurl ( under lens) is fully anticlockwise exposing letter "S" and not "U".
Gently cock ( charge) the shutter by rotating the double cocking knurls clockwise.
Remove dark slide ( or in your case, open the shutter on the dslr for a long time)
Fire the shutter by pushing the firing knurl anticlockwise towards "S"

Also the lens can be fired by an international taper standard ( not early USA parallel standard) release cable screwed into the lens, as shown in photo I posted above.

Cocking the shutter does not allow light through it,

Hope this helps and I will be very interested to hear how you make out on the Pentax dslr.

[ivanvernon]

Hi Ivan,
I have the 6x7 90 LS. In year 2012 I made my own 6x7 adaptor for that lens on the lathe, for a metal box camera I built.
I have made other 6x7 adaptors for the ordinary ( non leaf shutter or barrel ) Takumar 6x7 lenses for use on the Speed Graphic.

The 6x7 leaf shutter lenses ( there were only the 90 and 165) require an adaptor with one additional feature, compared to the barrel lenses.
I recall I have described or discussed the details on PF possibly with photos of the adaptor maybe in 2012 or 2013.
That additional feature ( I recall) holds the aperture wide open and i don't want to open my camera to check that tonight.

Then the lens is autonomous , it will switch the rear knurl to "AUTO" and the controls on the front of the lens will work as follows:
looking forward from back of camera:

First ensure the firing knurl ( under lens) is fully anticlockwise exposing letter "S" and not "U".
Gently cock ( charge) the shutter by rotating the double cocking knurls clockwise.
Remove dark slide ( or in your case, open the shutter on the dslr for a long time)
Fire the shutter by pushing the firing knurl anticlockwise towards "S"

Also the lens can be fired by an international taper standard ( not early USA parallel standard) release cable screwed into the lens, as shown in photo I posted above.

Cocking the shutter does not allow light through it,

Hope this helps and I will be very interested to hear how you make out on the Pentax dslr.

Thank you for your comments and explanations. Using the 165 on my K-1 and/or 645D may be a bit more complicated than I am prepared to deal with! I do have the 645 75mm LS operating correctly in its native environment on the 645N and 645D.