Adapter for Graflex lensboard

[boris]

I have a Linhof Technika 5x7 with an adapter for technika 4x5 boards. till now i use smaller lenses in technika 4x5 lensboards. so far so good.
Now i decided to convert my toyo metal field into a 5x7. the toyo uses graflex bords. Now, i would like to mount all my lenses into the graflex boards. as far as i know no adapter was made from linhof, so i have to make it myself...

i know that toyo made an adapter for the graflex board and i think that calumet did one too.
for an easy conversion it is best to have a flat adapter ( i just trim it to the right size and fix it with 4 bolts to a linhof 5x7 lens board ). as far as know the toyo isn't flat on the rear side, don't know about the calumet.

what i would like to know is: who made an adapter for the graflex 4x5 with a flat rear side.

thanks, boris

[jackpie]

A Pacemaker Speed or Crown Graphic front standard can be bolted to a sinar board to make a great adapter. I've done it but I don't know if it would fit on a 5x7 Technika board.

Graphic View to Pacemaker Graphic board adapters are also common. The Graphic View board is 4" square with a light trap ridge on the back. The light trap can be rebated into a larger board. I've done it into an Arca board. These adapters work well with small lenses, but the clip snags larger shutters, like Betax 4 and 5, not sure about Copal 3.

There are also Toyo brand Toyo View 158mm to Graphic adapters that are nice steel Graphic adapters bolted to the aluminium Toyo board. These are easy to fit to other boards.

The reason I know about this is because I am also a Toyo Field Half Plate user.

[banjo]

there are 2 kinds of Graflex lens boards
BUT I have done on some is get the lens standered off of an old speed & just screw it to the board of the camera that I need to use it on. I use black Velet between the two

[boris]

A Pacemaker Speed or Crown Graphic front standard can be bolted to a sinar board to make a great adapter. I've done it but I don't know if it would fit on a 5x7 Technika board.

the linhof 5x7 lensboard is smaller and the locking mechanic eat at least 1,5 cm from the 13cm square . don't think it is possible

Graphic View to Pacemaker Graphic board adapters are also common. The Graphic View board is 4" square with a light trap ridge on the back. The light trap can be rebated into a larger board. I've done it into an Arca board. These adapters work well with small lenses, but the clip snags larger shutters, like Betax 4 and 5, not sure about Copal 3

i am not sure if i understood... i will add an attachement of what i belive to be a "Pacemaker Graphic board adapter"
if i found the right picture it will not work with the linhof 5x7 the locking device will need too much space in the the front standart.

There are also Toyo brand Toyo View 158mm to Graphic adapters that are nice steel Graphic adapters bolted to the aluminium Toyo board. These are easy to fit to other boards.

do you have a picture of this one?

thanks, boris

[jackpie]

I've thought of another adapter that might work, the Rittreck to Pacemaker Graphic adapter. However I don't like mine much because the Graphic boards don't fit so well. They always seem to become loose. Also the Rittreck is larger than a Graphic View board.

Boris, your photo of the Graphic View to Pacemaker Graphic adapter is the one I was suggesting. I'm not familiar with the front standard of your Technika 5x7, but I wonder if you had a spacer plate between the board and the adapter it might leave room for the locking slides or mechanism.

I'll find the Toyo adapter and post some photos later.

[boris]

I'm not familiar with the front standard of your Technika 5x7, but I wonder if you had a spacer plate between the board and the adapter it might leave room for the locking slides or mechanism.

a spacer could resolve the problem but it is ugly i would prefer a neat solution.
waiting to see your toyo lensboard adapter.
boris

[jackpie]

waiting to see your toyo lensboard adapter.

The steel Graphic adapter is attached from the back by 10 small screws to the aluminium board. It can easily be removed but does have a raised light trap baffle that fits into the cut out on the Toyo board.

[boris]

o.k i see... but need still some help
could you please measure the dimensiones of the graphic steel adapter? the linhof board ist just about 129 mm square, so not much space will be left to play with
where from can i get a steel graphic adapter? what was it made for? is the rear side flat?
thank you, boris

[jackpie]

I've disassembled the Toyo Graphic Adapter.

I now see that the Graphic part isn't made of steel, it's a die cast alloy. It measures 122mm wide x 117mm high. The back sits flat on the Toyo board, but there is a 1mm raised lip around the centre, that fits inside the hole in the Toyo board and acts as a light trap.

I've also had a look at the adapter I made from a Graphic front standard. The Graphic lens holder that I attached to a Sinar board is only 110mm wide x 112mm high.

[boris]

two days ago a was a total ignorant, but now i beginning to see the light.
thank you very much !!!
boris