Isn't the Voigtlander lens originally a Mamiya built one? Hans
You tell me Hans, i only know the 135mm Voigtlander lens came with a icarex 35TM i once bought. I've briefly tested it before and it gave very good results, the f4 max aperture isn't that spectacular though...
From an Icarex TM, hm, than it is sure a Mamiya one... This Color-Dynarex stuff was also sold as (cheaper) alternative alternative to M42 lenses on the Voigtlander VSL1 camera, before they moved to the bayonet (QBM) mount. Hans
Post by belgiumreporter on Sept 9, 2017 7:22:49 GMT -5
Here's my first test in this seies, two (old M42) 135mm 1:3.5 super multicoated Takumars mounted on the K-X focussed at infinity, focus confirmated on the K-X. One in "as new" condition but with mold on the rear element, the other "well used" but clean glass. The results speak for themselves, the clean glass one produced tack sharp crisp images even wideopen, the moldy one had no sharpness and produced considerable purple fringing, stopping down did impriove the image a bit but it didn't came near the clean example. So even though one Takumar looks as new it's ready for the trash can or some thourough cleaning (if it can be saved...). The K-X with both lenses
1:1 enlargement of the image produced by the moldy Takumar wide open
1:1 enlargement of the image produced by the well used, clean optics takumar, wide open
Post by belgiumreporter on Sept 15, 2017 8:45:00 GMT -5
Inbetween rain showers i was able to do some quick testing.
Pentax K-x with M42 Takumar 200/4 wideopen
Nikon D300 with Nikkor 200/4 Ai wideopen
samsung Nx 1000 with Canon 200/2.8 wideopen.
So what is happening here? The takumar has a yellowish color cast and isn't as sharp as the Nikkor, wich in itselve is sharpest and most color neutral in this test.
But, but the canon looks sharper... but it isn't the 20Megapix of the samsung seems to give a slight resolution edge over the 12Megapix of the D300 and K-x.
Enlarging to 300% shows the more agressive in body sharpening of the Samsung wich gives higher contrast and artefacts that are smoothed out by the Jpeg compression giving the inpression of more sharpness but lead to loss in detail.
To be shure of the results the lenses should be swapped between bodies, sadly this isn't possible, partly due to diffrent flange distanses making it inposibble to attain infinity focus.
Any way all results are (to me) more than acceptable and these "old" primes perform very well no matter where you put them on.
With lens prices (the Takumar has cost me 2 Euro) at an all time low, bargains are to be had. Beware though as people are beginning to realise the real value of these lenses and prices are going up again!