Technika Adaptor & Sinar Shutter

[Ken Lee]

When I first got a Sinar P, I also obtained a Technika adapter. I probably got it on eBay, at a good value, from an "aftermarket" provider. It worked fine.

Later, I got a Sinar Shutter - which has 2 pins that protrude forward towards the lens.



That Technika adaptor, presses against those 2 pins - even when no lens or Technika board is on the adaptor. It prevents normal use of the Sinar shutter.

Is there a "better" or "correct" Technika adaptor out there, which doesn't interfere with the Sinar shutter ?

Many thanks !!

[Lachlan 717]

Ken,

Can you please post a photos showing this from a bit further away?

I use the shutter on a Horseman and on a Shen with no issues, but I suspect that their front standards are thicker than the Sinar one.

[Steven Tribe]

The bottom pin only moves through the radius slot in connection with F values under 5.6 and the operation of the dedicated sinar lens sets. So all you need is a small hole for the bottom pin and a short passage slit (1 cm) for the shutter catch (upper) pin. Even modified real Sinar boards can have problems. I have a sinar board which has been mounted with a wooden spacer which has been strong enough to cause a slight bending of the board - and interference with the pins. Oh, the copal shutter does still have the rubber gaskets in the recessed grove?

[Ken Lee]

"The bottom pin only moves through the radius slot in connection with F values under 5.6 and the operation of the dedicated sinar lens sets."

Eureka - That's the secret ! - And it explains why the board has worked intermittently in the past.

When we set the aperture to the smallest setting (f/5.6), the pin doesn't move at all. My existing Technika adaptor board works perfectly. I'm back in business !



"Can you please post a photos showing this from a bit further away?"

Here's a photo taken from further away, with the Technika adaptor board in place. The red arrows point to the outer edges of the board, as it sits within the Sinar shutter.

[Lachlan 717]

Ken,

It does look like the Sinar front standard is thinner than the Horseman/Shen Hao...

Explains why I haven't encounted this issue.

[SteveKarr]

Hi Ken,
I have a Sinar shutter too and use it with only barrel lens so I removed the pins.

If you don't have DB boards it's easy:

Take the 4 screws out of the front of the shutter in each corner, remove plate. The ring around the opening just lifts off, set aside. The upper right pin is on 2 small screws, remove & place all in a baggie for later reconstruction.

If you don't go poking around in there you're pretty safe.

Good Luck!
Steve