Mark Ransom

Mark Ransom

Lives in United States Minneapolis area, MN, United States
Joined on Feb 13, 2003
About me:

Pentax was kind enough to let me win a K-7 camera as a door prize. I try not to let that color my opinion of them; I've been a Pentax supporter long before that, but I'm not a fanboy.

Mark Ransom's recent activity

  • Just because it has a camera bolted permanently on the back doesn't disqualify it. Where you buy it is irrelevant. Sony and Zeiss have always teamed up to produce some decent lenses. The Sony F717 ...
  • Congratulations! I'm jealous - even with the discount it's outside my price range.
  • Replied in Use an adapter
    If you coupled a Metabones adapter with the Canon 600 F/4L I'm sure you could get some fantastic results. If the price makes you blink, then don't wish for a Panasonic or Olympus equivalent - ...
  • FF is the wrong choice for travelling light. Now you're simply trying to find an acceptable compromise. The 15-30 actually weighs more than the camera! I would suggest taking both lenses out ...
  • There are LOTS of things we need to know that Pentax won't tell us. And frankly there aren't any other companies who would either. The thing that makes it frustrating is that they're so slow.
  • Those are exactly the people I wanted to hear from though, so in that it was helpful. I've seen a couple of good examples from the PL 100-400. Absolutely. My question was more about the gray area ...
  • Sorry, my bad - the wording of the title makes it sound like I'm considering the 12-100 for macro, and you aren't the first person to think so.  What I'm talking about is near -macro, something in ...
  • When I see people get excited about the possibility of an organic sensor, I just shudder. If it has the same issues with degradation it would be a disaster. Be careful what you wish for.
  • I was wrong, the Sigma closeup filter that I have is sold separately: AML72-01. There are really no specs for it, other than it changes the maximum magnification of the 18-300 from 1:3 to 1:2. ...
  • Created discussion thread Bug? Picture shows too large
    Usually when you put a picture into a post, it is resized to fit the forum display. I just came across an example where that didn't happen. https://www.dpreview.com/forums/post/61390438 It's not my ...
  • The 100-250 F2.8 would be correct if we were comparing to a full-frame camera, but the D500 is APS-C. The proper specs for an equivalent m4/3 lens would be 150-400 F4. The PL 100-400 is both slower ...
  • The shadow noise could be reduced by using a faster lens. If someone made a 100-250 F2.8 lens for m4/3, it would be very competitive for taking those same bird shots. Unfortunately it would ...
  • Replied in Nothing false
    They don't measure the amount of light, they measure the intensity of light. As long as we're arguing semantics.
  • That was very helpful, thank you. I particularly like the estimates for the field of view width. The consensus seems to be that anybody having both the 60 and the 12-100 ends up getting rid of the 60.
  • Those are some stunning pictures, thank you. How did you manage that extreme closeup with the first flower at 100mm? based on other evidence I've seen presented here I would have guessed that was ...
  • As I said, it came with the Sigma lens as a matched pair - it's Sigma. I've never seen it offered separately.
  • I do value your opinion, thanks for sharing it. In my case I hate changing lenses, and I hardly ever use anything under F/5.6 (on APS-C) because I need the DOF and/or my lenses aren't that fast. I ...
  • If I'm correct about my example being about 15mm long, it looks like it's taking half the height of the frame so 30mm overall height. Pretty close to the 39mm you came up with, and I think I could ...
  • Interesting thought. I already have a closeup filter that came with my Pentax mount Sigma 18-300, and it has the same 72mm thread as the 12-100. I wonder if that would work?
  • Replied in interesting
    It may amaze you to know that some people actually prefer an optical viewfinder as used in a traditional DSLR. There will be nothing painful about the transition because it won't be a transition - ...
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Last post 9 hours ago
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Last post Jan 8, 2014
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Photos uploaded 467
Last upload 2 weeks ago