Dr JLW

Dr JLW

Lives in United States New England, United States
Works as a Engr
Joined on Dec 2, 2003

Dr JLW's recent activity

  • I have had similar issues with my Nex & and my vntage glass. I find that some lenses will not produce focus peaking,  This I take to mean that the lens just is not that good. On others I get good ...
  • Thanks for your reply.  I really appreciate it when some one has the character to say thank you. I have a few added thoughts. 1) You have to think hard about the math.  It's Ok if its hard and you ...
  • I agree with most of advice so far but you might be able to get a piece of glass or plastic to put on top of each page.  YOu have to do this carefully but you may also be able to use bean bags to ...
  • A couple of clarifications. Part of this thread as branched into a discussion of astronomical telescopes which is fine and interesting but the parent referred to coating and seems to refer to ...
  • A larger aperture admits more light than a smaller one but there is more to it and it' not all that complex. The larger aperture makes the image "brighter" if it can put all the light gathers onto ...
  • Fall color is superb almost anywhere you go in Vermont (0r New Hampshire or Western Mass).  I suggest you plan your trip on something you would like to see and take the foliage as it comes. There ...
  • I am not sure what you mean but my guess is that it is the eye sensor.  If you have not checked you should consult the the HS 10 manual which you can down load form Fujifilm if you do not yet have it.
  • If you like mechanical engineering stick to it.  I was a physics major and I found that a lot of what was hard for me eventually came to me after years of study. As others wrote you are unlikely to ...
  • I think the lens is more important than the body.  I make no claim that this is best but you get  lot of capability in a Sony Nex with their SEL10-18.  That is a very wide zoom with auto focus and ...
  • Assuming its and indoor museum with low light, I suggest teh faster lens and also a monopod if they let up bring one in. It also depends on what you are shooting at the museum.  When I shoot in ...
  • There are many different kinds of coatings with varying degree of hardness and durability. The ones from 1940' to 60's are usually magnesium fluoride and they are delicate. Later ones are harder. A ...
  • I just carry a monopod.  If you are going to carry two make one a monopod. I am assuming you travel in settled areas.  If you are traveling to a wildlife hide and are going to stay there several ...
  • My answer to the starting question is that film i snot a more suitable medium for long exposure photography although the question could be posed better. The issue is not exposure length but rather ...
  • A bit on noise. 1) Fixed pattern "noise" is a misnomer.  It is a fixed pattern of varying amounts of thermal emission or dark current.  Subtraction by a compensating frame of the same exposure ...
  • there are several web sites suggesting settings to use. Here is link to a previous thread on this' http://www.dpreview.com/forums/post/41000083 Your inquiry is too broad to suggest much more. ...
  • I think the development of autofocus enabled low cost zoom lenses making them the default.  Before auto focus, zoom lenses were expected to stay in focus when you zoomed.  Instructions were that ...
  • I tried a couple of sharpening filters from Photoshop.  It loses some realism but makes th writing clearer.  It also works beeter with more pixels than a screen shot.
  • With UV it's matter of degree. As a rule of thumb each element of a lens absorbs 90% so a typical lens absorbs a lot of UV. The question was initially posed as a general one. I suggested macro ...
  • Generally macro lenses should have long focal length to give you working room to set up lights. These will require focus stacking as noted.  Dollhouse and diorama photography is often better done ...
  • The only filter I use on modern lenses is a polarizing filter.  really old lenses benefited from UV blockers but virtually all lenses made since about 1970 block UV. I like ht idea of using a ...
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Total messages 522
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Last review Mar 14, 2012
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