Saturday, July 29, 2017

Yashica 50mm ML f1:1.4


Another thrift shop find, this Yashica 50mm 1.4 lens optically and mechanically in good condition, but has several cosmetic 'dings' and 'scuffs' at the front of the lens.  However, I had no problem screwing-on a 52mm UV filter in front of the lens despite the damage (see photo below).



Basic specifications for most lenses can be found at ALLPHOTOLENSES
Info for this lens in particular at: http://allphotolenses.com/lenses/item/c_436.html#prettyPhoto



The photos captured below were taken 'as-is" with the subject lens on a Samsung NX1, no filters were employed and there was no post-editing or effects added to the images.


CLICK ON ANY IMAGE TO ENLARGE
 f5.6_1-50s_0EV_IS0100

 f2.8_1-50s_0EV_IS0100

In the photo above, the focus was on the center blue/yellow basket.

 f8_1-50s_0EV_IS0100

f1.4_1-6000s_0EV_IS0100 

In the photo above, notice the Bokeh is more of a generalized Gaussian Blur effect than the typical 'geometric-shaped' Bokeh.

 f2_1-320s-0.3EV_IS0100

 f8_1-320s-0.3EV_IS0100

 f16_1-60s_0EV_IS0100

f8_1-125s_0EV_IS0100

 f8_1-250s_0EV_IS0100

f1.4_1-60s_0.3EV_IS0200

Note: in the photo above how shallow the depth-of-field is at f1.4.  

Friday, June 16, 2017

Hit or miss - Test photographs with an Albinar 28-80mm


The Albinar ADG MC 28-80mm f/3.5-4.5 Auto Zoom was distributed by BEST Products Co.(an American chain of retail stores from 1957-1996), with Albinar being a trademarked brand, the lenses of which were made by several Asian manufacturers. 

The lens is well-built, has a practical focal-range (28-80mm)and pretty cool looking on the NX1.  However, shooting with this lens manually takes skill to get the focus right.  The NX1 has 'focus-peaking' which helped get the focus close as possible, yet working the three (3) adjustment rings on the lens for near focus, focal length and overall focus complicate the process. 

The resulting photos shown below reveal a 'soft' lens at best.

Albinar 28-80mm f/3.5-4.5 lens adapted to Samsung NX1

The photograph below was taken just after sunset with the aperture wide-open (f3.5).  The photo is soft, but the camera resolved the image nicely.

f3.5    ISO200    +0.3EV   1/60sec

The additional photos below are shown as-taken. about 1/2-hour before sunset.





Tuesday, May 30, 2017

Konica Hexanon AR 50mm f1.7 Test Photographs


Not sure where I picked-up this lens, but it is the only Konica lens in my collection of vintage SLR lenses.  This model lens can still be pick-up cheap on eBay for about $20.


A general search came across this comment from Wikipedia:

"Konica SLR interchangeable lenses were named Hexanon. The optical quality of most Hexanon lenses is regarded as truly superb, particularly the older fixed-focal length (prime) lenses. Konica managed to achieve near excellent quality over a broad range of focal lengths in lens tests conducted by several photographic publications over the years. Hexanon lenses were used by the Japanese government as the standard against which all other lenses were measured."




For use on the NX1, I used an inexpensive 'Fotosay KR-NX' adapter.  For the test photos here the camera was set to 'manual'.  No filters were used.  Hand-held.  No post editing or color grading. Note: Overcast day.

Konica  HEX-AR  50mm   ISO100  f8  1/800s  EV -0.3 

Konica  HEX-AR  50mm   ISO100  f8  1/800s  EV -0.3

 Konica  HEX-AR  50mm   ISO100  f8  1/800s  EV -.03

Konica  HEX-AR  50mm  ISO100  f4  1/250s  0EV

Konica  HEX-AR  50mm  ISO100_f4  1/250s  0EV 
Note: Slightly overexposed. I should have stopped this down.

Konica  HEX-AR  50mm  ISO100  f11  1/320s  EV -0.3
Note: Focus looks slightly off on this photograph

Konica  HEX-AR  50mm  ISO100  f8  1/320s  EV -0.3


Konica  HEX-AR  50mm  ISO100  f11  1/320s  EV -0.3

Additional information from the Internet:

The Konica Hexanon AR 50 mm f/1.7 is a normal fast lens for SLR cameras with the Konica AR bayonet mount. It came in two variants of the lens with the same optical scheme.  The characteristics of the second version (after 1976 ) are equivalent to the lens in this post.

With the introduction of the internal linkAutoreflex TC, the Hexanon AR 50 mm / F1.7 was revised from the earlier version.  While the optical formula and optical quality remained unchanged, the lens barrel was made slimmer, shorter, and a good deal lighter. The price for this was a longer closest focusing distance of 0.55 m (1 ft 92/3") instead of the 0.45 m (1 ft 53/4") of the earlier version. In addition, the click stops of half aperture values were dropped.

Finally, in sharpness the image quality is first class. Contrast and evenness of illumination are just as convincing as the neutral colour rendition – all in all, the Hexanon AR 50 mm / F1.7 is absolutely a premium, first class lens.

Sunday, May 28, 2017

Mamiya/Sekor 50mm f2 lens


Test Photographs with the Mamiya/Sekor 50mm f2 Lens

Additional information and discussion will be posted soon 

Subject lens referenced in this post



Note: I have both the 50mm F2 mount type lenses: The M42-screw & bayonet mount types. 

[Mamiya/Sekor 50mm Lens]    f/11   1/160s   -0.3EV  ISO100

 [Mamiya/Sekor 50mm Lens]  f/8_1/160s   -0.3EV  ISO100

 [Mamiya/Sekor 50mm Lens] f/2  1/160s  -0.3EV  ISO100


 [Mamiya/Sekor 50mm Lens] f/8   1/250s  -0.3EV  ISO100

Monday, April 17, 2017

Test Photos - Tamron 28mm f2.5 Adaptall-2


The Tamron 28mm f2.5 lens (model 02B) with the Adaptall-2 mount system is a lens I have owned since 1986. The lens was made in Saitama, Japan by the Tamron Co., LTD.

I purchased it at the time for my Yashica FX-70 35mm camera.  I finally decided to give it a try on my Samsung NX1 using a C/Y (Contax/Yashica) to NX adapter (see photo below)



Below are the some specifications I found at AllPhotoLenses.com (click link for additional details on this specific lens:



I went out for a walk around the neighborhood about 1-1/2 hours before sunset. There were thin clouds obscuring the sun at times, but it poked-through for some of these photographs.

All the photographs shown here were "as-taken" JPEG's. There was no post editing with the exception of resizing from the large 23.4 megapixel APS-C sensor resolution.  All photographs were handheld and no filters were used, except where noted below the photo with the settings.

Note: I did not record the aperture settings, but I stayed within a range of f5.6 to f11 for this series


1/80 sec   /   ISO100   / EV 0

1/125 sec / ISO100 / EV 0

1/125sec / ISO100 / EV 0

 1/125sec / ISO100 / EV 0

 1/125sec  / ISO100 / EV 0

 1/125sec   /   ISO100   / EV 0 

 1/125sec  / ISO100 / EV 0

 1/125sec  / ISO100 / EV 0

 1/125sec  / ISO100 / EV 0

 1/125sec / ISO100  / EV 0

1/125sec / ISO100 / EV 0

  f/5.6   /  1/160sec / ISO100 / EV 0 / 0.9 ND Filter

 f/11   /  1/160sec   /   ISO100   / EV 0

F5.6 + half-stop / 1/50sec / 0EV / ISO100 / 0.9 ND Filter

Note: It was interesting to find out that this lens had a minimum aperture setting of f32.  I want to go back out in full sun and photograph this essentially "pin-hole" setting.  I will post these photographs when available.

Additional information links:

https://www.pentaxforums.com/userreviews/tamron-adaptall-2-28mm-f-2-5-02b.html

https://www.youtube.com/watch?v=Itbnr3ckOwg

http://www.vintagelensesforvideo.com/tamron28mm/

http://lensbeam.com/obektivy/obektiv-tamron-28-mm-f-25-adaptall-2

https://en.wikipedia.org/wiki/Tamron#Adaptall-2_lenses_and_adapters