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Forum: Pentax SLR Lens Discussion
02-28-2019, 01:37 PM
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So the Pentax-M 28mm f/3.5 arrived and it is not too bad...
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Forum: Pentax SLR Lens Discussion
02-21-2019, 08:30 AM
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I will be facing some heavy household investments this year, so that is where most of my budget will be going. But still, I do not want to give up and I am looking for the best value for the money I can spend...
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Forum: Pentax SLR Lens Discussion
02-21-2019, 02:04 PM
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Wow, so I have just spotted Pentax-M 28mm f/3.5 which according to some is just little behind the K 28mm f/3.5 for unbeliveable €44 shipped and within the country. The listing was just couple minutes old. I bought it. I am now wondering what piece of scrap metal I will be receiving. Wish me luck...
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Forum: Troubleshooting and Beginner Help
01-17-2019, 12:50 PM
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Hi gentlemen,
today in the morning the weather was again quite good, so I took the Sigma 18-200mm f/3.5-6.3 for couple of test shots. Everything was shot in aperture priority at f/8 as suggested. The results are following.
The Untersberg mountain:
Comparison of ISO 100 and ISO 200, original JPEG from camera, 100% crop, shot at 200mm end
- The resolution seems to be significantly better at ISO 100 than ISO 200, but still the ISO 200 is way better than the photo from yesterday taken with the Sonnar
- The photo at ISO 200 seems to have little bit of motion blur, so I need to make more tests
- Although the IQ is worse in the ISO 200, the noise is not as pronounced. However when taken to Lightroom there is no noise at Sharpen 25 for the ISO 100 while it shows significant noise on the ISO 200 at the same setting. (Sharpen 25 only to demonstrate the difference.)
The alpine landscape:
Original JPEG from the camera shrank to 1200px, shot at 73mm, ISO 100
Full size photo.
- Very good resolution throughout the image compared to the shot from the Helios, especially when looking at the road texture and snow touching the road
- ISO 100 and ISO 200 seem very comparable
- Good brightness, test shots with +0.5ev and +1ev as suggested by one of the commenters seemed to have been overexposed in the sky part
- Since the camera does not have detailed JPEG processing settings, I tried the "Custom image" setting:
- Bright made the dark part darker, but for example the tree was just black then
- Landscape and Vibrant gave the image more dynamic range and bit of saturation, but the overall brightness went down
So generally speaking it looks to me that as long as the lens supplies good picture then the camera is ok. But once the picture comming from the lens si suboptimal then it wreaks havoc on the final image...
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