Ken Strain

Lives in United Kingdom United Kingdom
Joined on Sep 22, 2012

Ken Strain's recent activity

  • If you are committed to MFT you could get this one It is a beautiful lens, particularly with respect to colour fringing (compared to any old-style 135). Ken
  • For roughly as much money as the Speedbooster, I'd go for the Rokinon 135/2 - looks like the same price at B&H for example. From direct experience - I bought for Nikon D800 but used on MFT - I ...
  • I don't have one of these lenses to examine, but another factor to add to the mix is flex at the lens mount. This variable can affect the dynamics of the situation by working in conjunction with ...
  • Well the second other one at least (https://www.dpreview.com/forums/post/54649287), but that was two years ago, and as promised, I did not store the image in my gallery for long. More seriously: ...
  • Replied in Read well
    Once again you have posted hard evidence that is strong and so far  I do not see anything that refutes it. Of course we do not know how bad that particular E-PL1 is,  and I would suspect it is ...
  • as well as all the obvious factors that affect the effect of shutter shock a few other things make it hard to predict: (1) it varies from body to body of the same model. I've measured that with two ...
  • Although I have no direct experience with the GX8. This has every appearance of shutter shock, indeed approaching the extreme worst case. It looks as bad as the worst camera I ever had in this ...
  • Yes, both cameras I had converted had appropriate thickness glass (or filter) in place to give close-to-normal focus.  I had the FS one set up with a 14mm lens, if I remember correctly. When ...
  • Probably AM3 / MN103 or similar - the main image processor. With Elpida RAM chip beside it (buffer etc.)

  • The 12-40 is quite good too - though its coatings reflect quite a lot of IR, enough to reduce the transmission enough to notice (and give some flare, at some focal lengths).  I suspect that ...
  • I dug out a few EPM1 images to see if I could quickly find one with a red or orange filter on the 9-18mm, unfortunately it seems that all such images were taken with the 14-15mm (which is good at ...
  • The GMs are completely shock free - the shutter only has a rear mechanical curtain, the first curtain is always electronic. Ken
  • That is a very general question, so here is a general answer. Any camera with a mechanical shutter which shakes the camera just prior to or during the exposure can show blur due to the motion. The ...
  • That would do it! The sensor gets moved ~100 times as much as is needed to correct for shake with the 7.5mm, so even though IBIS is slow - mostly working around 1/4 to 1/10th second - it can cause ...
  • Yes, white balance, easy-to-use channel mixer and the range of options for highlight-recovery are all good reasons to use RT with IR images.  I find the last important to let me use as much ...
  • I saw the double images, but until reading your post it did not occur to me to ask kiri to check that the IS focal length is set to 8mm for the Samyang. If it happens to be set at a very different ...
  • Replied in IR focus
    That's the big advantage of mirrorless+ liveview - WYSIWYG, and the Samyang which is the main problem at the moment, is a manual focus lens.  I think the only pitfall with focusing with a wide ...
  • I sold my 9-18 long ago - my memory (and what I wrote here in 2013) is that it was reasonably OK and even quite good for IR around 9mm f/5.6, but got quite poor at some longer focal lengths.  I ...
  • Hi kiri, yes, that's my experience.  I think the options for false colour reduce rather rapidly as the cutoff wavelength moves into and through the red part of the spectrum.  By 730nm there is not ...
  • Yes, when the filter was clean I could get very good monochrome IR results (the sensor response falls off beyond 730nm, so the image mostly comes from a band between about 730nm and 780nm or so. Th ...
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