JimH123

Joined on Oct 24, 2015

JimH123's recent activity

  • RawTherapee is a free product that has a tool for removing hot pixels. In the first image, the Hot Pixel remover is turned OFF and you can see a number of white pixels. They are white since this ...
  • Replied in heat, not ISO
    Very true.  If I compare my Olympus bodies with long exposures to my Sony A6500, it is no contest.  The Olympus cameras have many hot pixels and the A6500 has perhaps none.
  • If you want to shoot star scenes at night, a free program that is very good is Sequator. It allows you to stack unlimited images and to include dark frames. It also can be used to handle split ...
  • The problem with the camera doing the pixel mapping is that it doesn't use a very long shutter time, and thus doesn't generate as many hot pixels as you would with a much longer shutter time such ...
  • With today's mirrorless cameras, there is no pressing need to chimp.  I usually use the EVF and whatever the EVF is showing, that's what my captured image is going to be.  There are no surprises. I ...
  • Its not possible. Both lenses have the same flange distance. If you were to use the full frame lens, it would have to be mounted farther away than it normally sits in order to allow room for the ...
  • Have you looked at a lens collar? I measured my Tamron lens (which is the 55BB) and it is about 87mm diameter. I looked at lens collars and for the most part, they say what lens it will fit, but ...
  • There is no reason to put this thread down.  Computational photography is doing things for the non-photography crowd who are perfectly happy with their results and have no intent of buying high ...
  • I don't know of any recent, but I do have two. My favorite is the Autofocus Minolta 500mm Reflex lens and I like using it on the FF Sony A7iii. I can also use it with the Sony A6500 crop sensor ...
  • Here is a test shot using an Olympus Em1ii with a 12-40mm f2.8 lens. Taken at f2/8 for 1 sec and ISO 12800 handheld to see if I could keep the stars as points. It was successful. The noise was ...
  • Woops!  You're right.  At 70 years old, college physics is a long, long time ago.  I didn't differentiate correctly.   Was think about:   distance = 1/2 mass x acceleration squared.  Somehow I ...
  • Yes, m43 has an advantage.  And it is due to to mass of the sensor.  APS-C has a larger sensor, which means more mass.  And full frame has even a larger sensor, which means even more mass. In ...
  • If the light source is not a point source, it won't work.  This means that you can't see any width of the light source.  And it has to be bright enough to generate spikes. As for proper exposure, ...
  • Replied in A big no.
    Here is a comparison using IR that I made during the California fires in late 2018. First image is taken using a non-modified camera of a small mountain not even 1 mile away.  The smoke was so ...
  • I wonder if the camera is too close to the eyepiece? If you detach the camera from the eyepiece and carefully move it away from the eyepiece, do you find a place where it goes into focus? If so, ...
  • I have one lens that creeps when I hold it downward. Bought a band than looks like a big rubber band that I positioned onto the lens and all creep ended. I think the brand name was Lens Band if I ...
  • Replied in My results
    Have you looked at RawTherapee?  There are 13 different demosaicing algorithms to choose from.  When I using your RAW image and blowing it up nice and big, and then switching between the various ...
  • Replied in My results
    Very impressive results. I downloaded the two bottom images for a closer look and even tried Topaz AI on the noisy one -- it bombed out. What do you do next? Do you try to license or sell this ...
  • Replied in My results
    Your iWE result is quite impressive.  How does it look on regular images in which the noise level is too high?
  • I took the image I had processed in Nebulosity 4 since I thought it separated the lines the best. Then loaded it in Lightroom and did an edit in Photoshop. Next, created a layer and applied Neat ...
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