Gerry Winterbourne

Gerry Winterbourne

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

K-5
K-7
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
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

  • The point of this thread is "cheap" primes matching tele zooms in quality, so by definition the ones under discussion here would be no sharper. My point is that there's no significant demand for a ...
  • Simple logic - camera makers want to make profit by selling what people want to buy. They do market research to find out what people want, and if enough want something they make it (but see below). ...
  • This link tells you more than you want to know about flash for wildlife photography http://www.naturephotographers.net/articles0703/jm0703-1.html Note that it's only part of a set (go to the ...
  • Plenty of helpful information so far. All of that shows that you've asked your questions in the wrong order (I've now numbered them). The first consideration is your spatial relationship to the ...
  • I've read your response to others. I understand that as a beginner you need to try things out but there are some basics that are best learned theoretically. I'll start with depth of field (DOF): ...
  • What I did, some years ago, was buy the Pentax 35/2.8 Limited (that's Pentax talk for top quality) macro. I started with primes in my film days but tried a tele zoom. I've never really taken to ...
  • f/4 at 1 stop faster than f/5.6 has 1.4X the diameter of aperture, which means 1.4 x 1.4 on area and the thickness must also go up because the larger diameter means we're into a higher curvature ...
  • The actual zoom mechanism is relatively simple and cheap http://en.wikipedia.org/wiki/Zoom_lens and costs roughly the same whatever the FL range. Start from the obvious fact that a good, fast lens ...
  • No! Prime-zoom has nothing at all to do with focus. The difference is in framing : that is, how big or small is the field of view offered by the lens? The shorter the focal length the wider the ...
  • I've made "apparent" bold. Tedolf is right: while perspective depends on POV and nothing else, different FLs appear to alter spatial relationships. While what you sat about cropping of images from ...
  • I'm not sure I know exactly what you mean. However, my point is that if you carry more than one lens you will always find subjects both sides of the swap point. In fact, I usually shoot some ...
  • This actually covers two things: (1) the way the media behave before clipping and (2) how they clip. For (2) there's no doubt that digital has a hard cut off at clipping while with film it's almost ...
  • My experience is that if you want to capture what your kit allows you can't avoid multiple lens changes. I once thought 10-20 + 18-200 would make life simple: not at all, because the reason I ...
  • Replied in sky
    Ditto. I agree with a lot of Chris's comments but not all. The highlights in the sky are clipped or close to being so, which means that although the shot looks underexposed it isn't by one of the ...
  • Photography is a very wide discipline. You can carve it is several ways, but each cut removes some of the discipline. You can't learn the whole discipline by using only part of it. If the only part ...
  • Two aspects of greatness: the scene/image itself and its technical quality. Scenes first: they depend on your eye and the FOV the camera-lens offers. Your eye is what it is; the FOV depends on the ...
  • f/3.5 at 35mm FL is a diameter of 10mm; at 100mm it's 28.6mm. 28.6 is bigger than 10mm. For the very simplest one-element bi-convex symmetrical lens, if you took the lens that focuses 35mm behind ...
  • They do serve both formats, bur in completely different ways. A few examples: 50mm on FF is the classic general walk-around lens; on crop it's equivalent to 75mm - short tele, quite close to the ...
  • I've not been on this forum much lately so I'm out of touch with the rumour mill. My mostly Nikonian brother has several old Pentax-mount lenses of various types. At present he has my K-7 on loan, ...
  • Replied in Is it worth it
    Yes for some people, no for others. We have no way of knowing which category you fit. If you don't know if the extra cost of FF is worth it, why commit yourself to FF lenses? Why buy bigger and ...
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Total messages 7422
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Last post Apr 12, 2013
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Last review Mar 24, 2007
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