Showing posts with label legacy lenses. Show all posts
Showing posts with label legacy lenses. Show all posts

6 May 2016

Where to begin...

Searched through the shelves and cabinets today to gather all my full frame Pentax lenses with autofocus. Its logical to begin there. And the manual focus lenses are so many more. The picture collect all of them except for some Pentax-F lenses, and the Sigma lenses. So it is mostly FA lenses, except for the F fisheye zoom, my only FAJ and the DFA 100mm macro. Missing is also the DA 50mm...that should be a full frame despite the "DA". The K-1 is accompanied by my two best autofocus film boddies, the Z-1 and the MZ-S. So its a fully full frame team.

I've taken some first shots with about a third of the lenses today and yesterday. No formal tests yet...just shooting to get a feeling for the camera. Generally, the autofucus is very fast. It must be the largest step in autofocus speed since between the K-7 and the K-5 (going from K-3 to K-1). The camera is also a very fast shooter. Easilly end up shooting several more shots than intended when I press the shutter. Must learn to avoid that, considering the picture size, or I will ruin my self on the back up HDs. Must try some BIF with the K-1....and DIF (Dragonfly in flight).

It is wonder to see again how wide the lenses really are. Even 28mm is again a wide angle. The FA 20-35mm, and the FAJ 18-35mm gives vertigo in the short end. The normals are again normals, not portrait lenses. But I've kept shooting enough 35mm film to not have forgotten. The strange swiwel view screen comes out really handy for macro...and also for street shots! If the construction hold for field work, it can turn out a genious move by the designers. I'm trying to get used to the new third wheel....and trying to figure out the fast way between auto and manual ISO. Probably I should read the manual. ;)

Just a short on my Sigma lenses, since some have reported problems with Sigma lenses on the K-1. This is probably due to Sigmas habit of backward-engineer the communication scheme etc to each brand, and their habit of giving several different lenses the same model ID. But my copies of the Sigma 20mm f1.8 and the Sigma 180mm f3.5 macro 1:1 focus very well on the K-1. So do my ancient Sigma AF 400mm f5.6.


30 May 2013

My new Digital Konica camera!

For the first time since 1983 I am traveling without a Pentax camera.It is somewhat scary. Instead I have the Samsung NX20 EVIL with a Konica AR adapter from FOTGA and a bunch of Konica Hexanon AR lenses.
In honor of Konica, my first SLR system 1980-1983,  I've searched my cabinets for an old Konica labelled shoulder strap. On the camera in this humble phone-shot, you find the Hexanon AR 40mm f1.8 pancake. With me in the bag is also the

Hexanon AR 24mm f2.8
Hexanon AR 57mm f1.2
Hexanon AR 85mm f1.8
Macro-Hexanon AR 105mm f4 with the autohelicoid

And I almost forgot...I also have one Samsung "pancake-zoom" 20-50mm with me. If I crawe autofocus at some point.

There is a lot I cannot say yet about this camera until I have worked with the images it deliver. But one annoying thing must be reported.

When the NX-AR adapter arrived yesterday and I mounted it on the camera (with a lens), the camera insisted with sending error-messages such as "no lens" and "lens detached" and refused to shoot. I've seen that some adapter manufacturers list one earlier Samsung model as having this problem, but I don't remember which one. The NX20 appeared to be too new, it wasn't listed as a problem, but usually not as an confirmed option either.
After some experimenting I discovered that the mount includes a pin that are pressed into the camera body when a lens is mounted, but for some reason, the original Samsung lens trigger this, but the adapter doesn't, despite that I cannot see any difference in size of the teeth of the adapter v.s. original lens mount. The original lens has a plastic mount, but the adapter is metal, so first hypothesis was that the mount didn't work if it was conductive, but after some experimenting, with metal and non-metal tools, it turns out to be wrong. What is this!
It took me about 20 minutes to take apart the camera and discover a way to get around this. The female lens mount is easily removed with a screwdriver. Four screws. Behind the metal ring, a plastic ring and a second metal ring. Removing all three (carefully noting their position), I could remove the critical metal pin. There is a small spring around the pin. After some experimenting it turns out that deep inside the whole where the pin resides, there is some sort of sensor that detect if a lens mount is pressing the pin into the body or not. I took a bit of metal foil (it did not have to bee conductive, but metal foil is easy to shape), formed a cylinder of about 1mm diameter, 2-3mm length, and then jammed the foil into the whole, pushing, pushing, and then inserting the metal pin and spring, replacing the mount rings and screws...
And it works! Now the camera is always convinced that there is a lens in the camera mount. And it doesn't interfere with any other functions.

What I wonder most is why Samsung has included this idiotic pin? The only explanation I can see is if they are actually trying to make it difficult to their customers to mount and use adapters and old lenses...



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