Gerry Winterbourne

Lives in United Kingdom Berkshire, United Kingdom
Works as a Retired
Joined on Mar 24, 2007
About me:

K-3
K-5
Sigma 8-16/4.5-5.6
DA 35/2.8 macro ltd
FA 50/1.4
DA 70/2.4 ltd
DFA 100/2.8 WR macro
DA* 200/2.8
Tamron SP 300/5.6 tele-macro
Pentax AF Rear Converter 1.4X AW
Kenko 2x DGZ TC
13, 21, 31mm extension tubes
Q
8.5/1.9 (01)
K-to--Q mount adapter
AS540FGZ
AS360FGZ
3 tripods

Gerry Winterbourne's recent activity

  • This comes in two parts. First simple geometry. Look at this diagram, which is from http://photographycourse.net/photographic-lenses/ It has no dimensions on it because the principal is the same ...
  • No one knows "what to look for". The whole point about vision is that it is autonomous - it just works by itself without any conscious knowledge. Although we don't really know how the internal ...
  • Nut it's still wrong. As no light has colour then it's the opposite of what you are saying: the human eye does not perceive light that is not colour"; indeed, all the light the eye perceives is not ...
  • No, exactly wrong! Light is energy; that energy excites chemicals in the retina; those chemicals send signals to the brain. Some brains interpret those signals as colours but the majority don't. ...
  • It's perfectly possible to find that some consumers can't distinguish between different wines without upsetting the idea that many can. One would need to know the nature of the trials, the size of ...
  • He isn't doing that. He's simply pointing out that the lens is one part of what goes into creating a photographic image. Clearly it plays no part in paintings and other images that aren't ...
  • I used a rangefinder camera in the early 1970s and found the parallax of the viewfinder (even with some markings there) irritating and frustrating. That took me to SLRs. DSLRs have much in common ...
  • But sure enough to use one and dispute the fact that you put it in the wrong place. But, indeed, off topic.
  • You seem to be thinking about two different things. A long exposure will blur things like moving water and car lights. Depending on how long it can mean people and other moving objects don't get ...
  • I only mentioned it because you did hyphenate it. And sometimes, especially if text is justified, words do need hyphenating. The way words are combined is natural and tends to follow patterns. ...
  • The problem with anecdotal evidence like this is that different people get dramatically different results. I've tested lenses up to 200mm with IBIS and achieved better than 4 stops of benefit. I'm ...
  • [If you want to hyphenate binocular it's bin-ocular. The "n" is attached to "bi" to make its separation from "ocular" easier to say.] Not really. This link explains quite a few ways in which we ...
  • Replied in Not for me
    As already said, as there is no generally accepted definition of what 3-D pop means your decision must depend on what the term means to you. For me, 3-D pop means that when I see a picture it looks ...
  • Replied in Focus doubt
    Yes, there are many people who can do things well but are hopeless when it comes to teaching other people to do those things. Before I go further, I must emphasise that I'm not disagreeing with ...
  • Using a tripod would be better but I don't see any obvious evidence of shake in these shots. I think you probably are. Bear in mind that digital photos usually benefit from a touch of sharpening: ...
  • True. There's another very similar thread and I checked wide v boyfriend but in the wrong thread.
  • Yes No. Whether the camera is a DSLR or mirrorless when you but an interchangeable lens camera you are buying into a system, and I don't think that's a good first step. Indeed, but for a first step ...
  • My advice is to some extent negative - I think you should avoid interchangeable lens cameras. Yes, Canon and Nikon (and Pentax) have some cheap DSLRs and they have their advantages (I'm writing as ...
  • That's what he did. The process is very simple: download both pictures, open them in Photoshop,  copy one of them and paste it onto the other. This creates a new layer for the copied version. Set b ...
  • No. A FF camera has the potential to deliver better quality than a crop-sensor camera. However, the main benefits come in two ways: (1) the bigger sensor gathers more light so when the light is ...
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Total messages 13048
Threads started 148
Last post 2 hours ago
Total comments 4
Total likes 12
Last post Apr 15, 2016
Total reviews 1
Last review Mar 24, 2007
Entries 0
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