Forgot Password
Pentax Camera Forums Home
 

Reply
Show Printable Version Search this Thread
05-15-2015, 01:18 AM   #5176
Veteran Member
Cuthbert's Avatar

Join Date: Nov 2013
Photos: Gallery
Posts: 1,740
I've got M28 and M35 f2.8.

IMO they are not stellar design, they do their job nicely but they are not extra sharp, their main atout is the small size....I have no experience with A lenses but a lot of people says the A50 mm f1.2 is sharper than the K50mm f1.2 so it's possible that through the years the SMC coating has been improved.

05-15-2015, 02:11 AM   #5177
Veteran Member
Dewman's Avatar

Join Date: May 2012
Location: Idaho
Posts: 5,369
Your comment about the lens hood made me give the subject some thought. I have a Pentax M42 135mm lens that I never use, and it has a metal hood - the screw-on type - and I just tried it on my100mm lens and voila! At first, I thought vignetting might be a problem, but a couple of test shots disproved that.
05-15-2015, 03:14 AM   #5178
Pentaxian
womble's Avatar

Join Date: Apr 2010
Location: Hertfordshire
Photos: Gallery
Posts: 3,763
QuoteOriginally posted by Dewman Quote
Your comment about the lens hood made me give the subject some thought. I have a Pentax M42 135mm lens that I never use, and it has a metal hood - the screw-on type - and I just tried it on my100mm lens and voila! At first, I thought vignetting might be a problem, but a couple of test shots disproved that.
I often use the metal Takumar hoods on my later lenses. The one for the Tak 135/2.5 fits my K135/2.5 very nicely and is less delicate than the K-series hood.

K.
05-16-2015, 12:07 PM - 1 Like   #5179
Veteran Member
Jorgario's Avatar

Join Date: Jul 2013
Location: San Josť
Photos: Gallery
Posts: 2,769
M135 / 3.5:



05-16-2015, 05:31 PM   #5180
Loyal Site Supporter
Loyal Site Supporter
Canada_Rockies's Avatar

Join Date: Nov 2007
Location: Sparwood, BC, Canada
Photos: Gallery | Albums
Posts: 12,200
QuoteOriginally posted by Dewman Quote
Your comment about the lens hood made me give the subject some thought. I have a Pentax M42 135mm lens that I never use, and it has a metal hood - the screw-on type - and I just tried it on my100mm lens and voila! At first, I thought vignetting might be a problem, but a couple of test shots disproved that.
Using a hood for a 135 mm 24x36 on a 100mm with 16x24 sensor works out just about perfect match I would not have expected it to vignette. The vignetting would be outside the frame seen by the APS_C sensor.
05-16-2015, 05:54 PM - 2 Likes   #5181
Veteran Member
Jorgario's Avatar

Join Date: Jul 2013
Location: San Josť
Photos: Gallery
Posts: 2,769
M 135mm f3.5 on M Bellows and no post processing:

05-16-2015, 06:46 PM - 1 Like   #5182
Veteran Member
Cuthbert's Avatar

Join Date: Nov 2013
Photos: Gallery
Posts: 1,740


M50 mm f1.4 wide open, Pentax LX AE priority and Portra 160.

05-17-2015, 08:58 AM - 2 Likes   #5183
Veteran Member
Jorgario's Avatar

Join Date: Jul 2013
Location: San Josť
Photos: Gallery
Posts: 2,769
I recently acquired the M 75-150 / 4 and this little barrel impressed me:




Last edited by Jorgario; 05-17-2015 at 10:09 AM.
05-17-2015, 10:38 AM   #5184
Veteran Member
Dewman's Avatar

Join Date: May 2012
Location: Idaho
Posts: 5,369
QuoteOriginally posted by Jorgario Quote
I recently acquired the M 75-150 / 4 and this little barrel impressed me:




Very nice, Jorgario. I too have one of the 75-150mm lenses and I like it a lot. It will render blues & reds, side by side, very well! Not many lenses will do that with those colors.
05-17-2015, 11:59 AM   #5185
Veteran Member
Jorgario's Avatar

Join Date: Jul 2013
Location: San Josť
Photos: Gallery
Posts: 2,769
QuoteOriginally posted by Dewman Quote
Very nice, Jorgario. I too have one of the 75-150mm lenses and I like it a lot. It will render blues & reds, side by side, very well! Not many lenses will do that with those colors.
Thank you very much Dewman !!
05-17-2015, 01:48 PM - 1 Like   #5186
Veteran Member




Join Date: Apr 2010
Location: Wiltshire/Hampshire
Photos: Albums
Posts: 1,760
NEX-5N, M50/1.4 at about f/2.8 - sharp enough?!








05-17-2015, 02:46 PM   #5187
Veteran Member
Cuthbert's Avatar

Join Date: Nov 2013
Photos: Gallery
Posts: 1,740
Sharp enough if you haven't used any post processing to pimp the pics, which I doubt because I noticed most of the people who shoot digital use a lot of stuff to enhance their pics and then show them in various forums to "prove" that for instance a pretty mediocre Leica lens, the Summarit f1.5 that is a low resolution low contrast old glass can produce razor sharp pics wide open.

If I really have to judge the performance of a lens I look at the negatives or at unadulterated scans from positives.re

For instance, here there two pics of the M200 f4, not the sharpest M lens in my kit:



Ok overcast, some haze, pollution, but you see at f8 is not as sharp as a K50 mm f1.4...fair enough, I think that even for architecture it's an interesting pic enough...and you can use the 2 huns also to make interesting shots with its limitations:



A lot of people like this one for instance, despite of the less than ideal lightning and the less than perfect sharpness at f4.
05-17-2015, 02:47 PM   #5188
Veteran Member
Jorgario's Avatar

Join Date: Jul 2013
Location: San Josť
Photos: Gallery
Posts: 2,769
Another one from the M 75-150 / 4:



And also from the same lens:


Last edited by Jorgario; 05-17-2015 at 06:07 PM.
05-18-2015, 05:30 AM   #5189
Pentaxian
LensBeginner's Avatar

Join Date: Sep 2014
Photos: Albums
Posts: 4,693
QuoteOriginally posted by Cuthbert Quote
Sharp enough if you haven't used any post processing to pimp the pics, which I doubt because I noticed most of the people who shoot digital use a lot of stuff to enhance their pics and then show them in various forums to "prove" that for instance a pretty mediocre Leica lens, the Summarit f1.5 that is a low resolution low contrast old glass can produce razor sharp pics wide open.

If I really have to judge the performance of a lens I look at the negatives or at unadulterated scans from positives.

*snip*
Well, there's some truth in that, but there's some truth in its opposite as well.
One lens can have low contrast but good resolving power, and/or can withstand some massive amount of [...] (insert "contrast", "clarity" or "sharpening" here) without the details breaking apart.

Since the end result is always an image "processed to taste from RAW" (that is, if one shoots RAW), then it stands to reason that it's fair to use a converter software to what extent the image will let me.
With some lenses, you don't get much leeway in the first place thus you won't get results as good as with another one.

We have a saying here, which goes more or less like this (translated): "Leave it alone: if it's sh*t, the more you shuffle it, the more it stinks..."
05-18-2015, 09:00 AM   #5190
Veteran Member
Dewman's Avatar

Join Date: May 2012
Location: Idaho
Posts: 5,369
QuoteOriginally posted by LensBeginner Quote
We have a saying here, which goes more or less like this (translated): "Leave it alone: if it's sh*t, the more you shuffle it, the more it stinks..."

I couldn't agree more with your somewhat humorous statement! Far too often, I see a fair image ruined by over-zealous application of unsharpmask. Some think that it will sharpen a poorly focused image. 'taint so! It only makes it apparent that the image was processed by an amateur. Personally, if I have an image that isn't sharply focused, I delete it. The only instance where I might keep it would be if it was an important shot and it wasn't possible to re-take it. Even then, I'm embarrassed for it to be seen by eyes other than mine. Sharpness and composition go hand in hand. If it's lacking either of those two elements, it's not worth saving and I cull it with a swift hand!
Reply

Bookmarks
  • Submit Thread to Facebook Facebook
  • Submit Thread to Twitter Twitter
  • Submit Thread to Digg Digg
Tags - Make this thread easier to find by adding keywords to it!
28mm, background, bokeh, camera, city, colours, contrast, dust, elpolodiablo, flickr, focus, hood, k-5, lens, lenses, light, m50/1.4, park, pentax, pentax lens, photo, picture, pm, post, pp, ps, shot, thanks, time
Thread Tools Search this Thread
Search this Thread:

Advanced Search


Similar Threads
Thread Thread Starter Forum Replies Last Post
The F Club! jsherman999 Lens Clubs 1060 3 Hours Ago 08:58 AM
The A Club jake.astig Lens Clubs 3824 5 Days Ago 11:04 PM
D-FA WR Club Rico Lens Clubs 640 11-29-2021 05:43 AM
Ltd club, here I come axl Lens Clubs 21 12-12-2010 03:06 AM
In the club again metroeloise Post Your Photos! 4 10-20-2008 08:59 AM



All times are GMT -7. The time now is 11:59 AM. | See also: NikonForums.com, CanonForums.com part of our network of photo forums!
  • Red (Default)
  • Green
  • Gray
  • Dark
  • Dark Yellow
  • Dark Blue
  • Old Red
  • Old Green
  • Old Gray
  • Dial-Up Style
Hello! It's great to see you back on the forum! Have you considered joining the community?
register
Creating a FREE ACCOUNT takes under a minute, removes ads, and lets you post! [Dismiss]
Top