Sharpest 50 or 55mm Prime Lens


Mac

Link Posted 19/07/2013 - 18:53
I've always heard that the SMC 1:1.7 was the sharpest of the bunch.

I have a 1:1.8, a 1:1.4, and a very sharp Macro f4 all in M42 mount adapted to K.

I personally like to use lenses wide open when possible, and find the 1:1.4 too soft and the 1:1.8 mediocre.

So, if I may:

Is the 1.7 in fact, the sharpest 55 or 50 mm prime?



Appreciate any and all input with thanks,

Malcolm from Montreal
Last Edited by Mac on 19/07/2013 - 19:00

DrOrloff

Link Posted 19/07/2013 - 19:22
The K55mm f1.8 I think is a cracker, as sharp as I would want it to be, never disappoints always surprises. I favour it strongly over the M50mm f1.7 but that is a good lens too.
You can see some of my photos here if you are so inclined

johnriley

Link Posted 19/07/2013 - 19:50
Stopped down to f/8 it might be very difficult to tell most of them apart.

At open aperture, probably one of the macro lenses.
Best regards, John

Algernon

Link Posted 19/07/2013 - 19:58
The 50mm f/2.8 FA Macro or possibly the DFA version.
Sharp at f/2.8 no need to stopdown unless you need
the extra DOF

The 50mm f/1.7's are all very sharp. I like the A Series
and the f/1.4 A isn't far behind the f/1.7


'
Half Man... Half Pentax ... Half Cucumber

Pentax K-1 + K-5 and some other stuff

Algi

Mac

Link Posted 19/07/2013 - 20:25
Thanks to you all, very much!

I appreciate your quick responses.
Mac from Montreal

SP, SPII, SPF, PZ-10, P30, SFX, K110D, istDS, Optio 60, Z-10, H90, RZ10, I-10, f3.5 28mm, f1.8 55mm, f1.4 50mm, f3.5 135mm, f2.5 135mm, f4 50mm Macro, f4.5 80-200 F, f4 35-70, f3.5 28-80, f3.5 35-135, f3.5 18-55, f1.8 31mm Ltd., two Auto 110's, Auto 110 lenses and filters, tubes, bellows, Manfrottos and a sore back.

Ralphpiano

Link Posted 19/07/2013 - 22:44
Hi Mac,

I have a D-FA50 2.8 for sale at the moment if you can't source one in Canada. £230 plus postage.

Mac

Link Posted 19/07/2013 - 22:48
Thanks Jason.

I'll certainly keep you in mind.
Mac from Montreal

SP, SPII, SPF, PZ-10, P30, SFX, K110D, istDS, Optio 60, Z-10, H90, RZ10, I-10, f3.5 28mm, f1.8 55mm, f1.4 50mm, f3.5 135mm, f2.5 135mm, f4 50mm Macro, f4.5 80-200 F, f4 35-70, f3.5 28-80, f3.5 35-135, f3.5 18-55, f1.8 31mm Ltd., two Auto 110's, Auto 110 lenses and filters, tubes, bellows, Manfrottos and a sore back.

sebas77

Link Posted 20/07/2013 - 00:41
I used to have a 1.7, I recently got a 1.4...I have the impression that the 1.7 was slightly sharper..but so far could be just an impression.

Mac

Link Posted 20/07/2013 - 00:49
Sabastiano,

The 1.4 M42 I have used to have the famous yellowing from some radio-active coating or other. Had to let it sit in direct sunlight for several days. Now it is clear as a bell and captures colours very nicely, but is soft wide-open - making it a nice portrait lens but disappointing for scenery or street work.

Thanks for your observation!
Mac from Montreal

SP, SPII, SPF, PZ-10, P30, SFX, K110D, istDS, Optio 60, Z-10, H90, RZ10, I-10, f3.5 28mm, f1.8 55mm, f1.4 50mm, f3.5 135mm, f2.5 135mm, f4 50mm Macro, f4.5 80-200 F, f4 35-70, f3.5 28-80, f3.5 35-135, f3.5 18-55, f1.8 31mm Ltd., two Auto 110's, Auto 110 lenses and filters, tubes, bellows, Manfrottos and a sore back.

gartmore

Link Posted 20/07/2013 - 08:15
Possibly my favourite is the F f1.7 which is razor sharp with particularly nice colour rendition and contrast
Ken
“We must avoid however, snapping away, shooting quickly and without thought, overloading ourselves with unnecessary images that clutter our memory and diminish the clarity of the whole.” - Henri Cartier-Bresson -

smc

Link Posted 20/07/2013 - 09:49
The Macros might be better adjusted for close work.

The M50/1.7 and k55/1.8 lenses are very well built and with excellent sharpness and colour, for very little money.

Mac

Link Posted 20/07/2013 - 10:23
Thanks SMC.

Maybe I should take another look at my 1.8 - certainly well put together!
Mac from Montreal

SP, SPII, SPF, PZ-10, P30, SFX, K110D, istDS, Optio 60, Z-10, H90, RZ10, I-10, f3.5 28mm, f1.8 55mm, f1.4 50mm, f3.5 135mm, f2.5 135mm, f4 50mm Macro, f4.5 80-200 F, f4 35-70, f3.5 28-80, f3.5 35-135, f3.5 18-55, f1.8 31mm Ltd., two Auto 110's, Auto 110 lenses and filters, tubes, bellows, Manfrottos and a sore back.

DrOrloff

Link Posted 20/07/2013 - 10:43

geordie01

Link Posted 20/07/2013 - 10:54
Another vote for the K55/1.8

Algernon

Link Posted 20/07/2013 - 11:39
Some test results...

http://www.cetussoft.com/pentax/resolutn.htm
http://www.takinami.com/yoshihiko/photo/lens_test/pentax_normal.html

Generally the A Series are sharper than the M Series.

'
Half Man... Half Pentax ... Half Cucumber

Pentax K-1 + K-5 and some other stuff

Algi
Last Edited by Algernon on 20/07/2013 - 12:07
Add a Comment
You must be registered or logged-in to comment.