Pentax *ist DS and Kodak Aero-Ektar 7 inch f/2.5 Lens

[wigwam jones]

<p>Thought some of you might enjoy this. I recently mounted a

WWII-era aerial photography lens (used in Allied bombers) on my *ist

DS and took a few photos around my house. The lens had been modified

by a previous owner with a custom helicoid focus mount that ended in a

40mm threaded tube. I stuck some gaffer tape on the end of the mount

and shoved an old Vivitar M42 extension tube over that - it was

sufficiently tight fit to allow mounting the *ist DS to the end of the

M42 extension tube. Somewhat MacGyvered, but it worked. Love using

it as a macro lens - 178mm equivalent to 200+mm f/2.5 lens that is

sharp and really tosses that background out of focus.</p>

<p><img

src="http://www.cameramentor.com/images/aero_ektar/small_ps_imgp2104.jpg"/></p>

<p>The rest are here:</p>

<a href="http://www.cameramentor.com/images/aero_ektar">Aero Ektar</a></p>

<p>Best,</p>

<p>Wiggy</p>

[jeffpolaski]

Could it be that the arrival of the istDS will encourge the rest of us to experiement with diffferent lenses just like the original photogrphers did in the good old days? Great photos!

[wigwam jones]

Thank you! Yes, I hope to continue to lash together various kinds of lenses and figure out how to make use of them with the Pentax - all kinds of worlds are open now.

 

I have an old LF view camera. I'm guessing someone could machine some kind of 42mm threaded tube stuck to a back for me - then I could mount the Pentax *ist DS on the back of the view camera and use any number of weird and wonderful lenses, maybe some with movements!

 

And I've got a small collection of oddball lenses like the Aero Ektar - for coper machines, things like that. Big fun with ultra-fast apertures and the shallowest DOF in the known universe!

 

Yes, I could have done all this with film - and some people have (I've seen most of the lens-hacking websites). But with digital and immediate results, you know right away if you're on to something or if you should give up on a particular experiment.

 

Best,

 

Wiggy

[Jochen_S]

Thank you for posting, Wiggy. I loved the headshot of the blue eyed dog.

A adapter k-mount to Linhof 5x7" rear standart is still on my to-do-list. - At least I already purchased plywood.

[paul_ewins]

You mean something like this?<div></div>

[paul_ewins]

I've gutted a broken Ricoh 50mm lens to make a tube with a k mount on one end and the normal filter thread on the other. An appropriate size hole was bored into a sheet of 6mm (1/4") aluminium and then a step-up ring was screwed into the filter thread from the other side to hold it all in place. The plate is cut to the same dimensions as the ground glass so I simply swap one for the other. As a bonus the lens body retains the helicoid so I het some extra fine focussing as well.<div></div>

[paul_ewins]

and here's the other side showing the step-up ring holding it together, along with some fairly strong glue.<div></div>