Road Train !!!!!!!!!!

by Russell McMahon

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92,093 reputation
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bio website mattgrum.com
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visits member for 3 years, 11 months
seen 10 hours ago

Aug
4
awarded  Enlightened
Aug
4
awarded  Nice Answer
Aug
4
revised Are there super-macro lenses for getting “inside”?
added 44 characters in body
Aug
4
comment Is there a cheaper alternative to Novoflex' Macro Reversal Adapter for controlling a reversed lens?
@ysap Firstly the 85L makes a poor choice of lens to reverse, you want to use a wideangle lens which will give you higher magnification, secondly I highly doubt the canon AF motors have sufficiently fine steps to AF properly at super macro distances, or whether the AF system will perform correctly at all with the lens reversed (will definitely depend on whether the lens is internal focus or not).
Aug
4
revised Are there super-macro lenses for getting “inside”?
deleted 22 characters in body
Aug
4
comment What resolution should be used for images that are to be used in focus stacking?
If you're focus stacking, then the intermediate file may be huge, but the final flattened image will be the same size as any one of the source images, a very manageable 18 megapixels.
Aug
4
revised Are there super-macro lenses for getting “inside”?
added 473 characters in body
Aug
4
answered Are there super-macro lenses for getting “inside”?
Aug
4
comment Are there any DSLRs which can charge the battery via USB?
I don't see the option of internal charging via USB to be a disadvantage, provided the battery is removable you can do either. And if you're on a trip and forget the charger or it fails you've got a useable (if annoying) alternative.
Aug
3
revised How can one capture gun bore shots?
added 375 characters in body
Aug
3
comment Perspective Warp vs. Tilt-Shift
I think there's more to it than just the philosophy of doing it in camera vs doing it in post. For example perspective correction in camera requires a tilt lens with a larger image circle, and sharpness can decrease rapidly at full shift, on the other hand software correction requires upsampling of parts of the image and cropping, both of which reduce detail. There are probably cases where one technique gives overall better results and vice versa.
Aug
3
comment Are there any DSLRs which can charge the battery via USB?
It's notably not a view shared by Sony, who ship the pretty serious $2000 A7R with a USB cable and plug but no external battery charger!
Aug
3
answered How can one capture gun bore shots?
Aug
1
answered How to identify whether the available light is too harsh or too soft?
Aug
1
comment Is there an “optimal” background distance when striving for a minimally distracting background?
There will be no mathematical optimal distance or even a rule of thumb, as the tradeoff between including more of the background and having the background more blurred depends entirely on the content of the background!
Aug
1
revised Do megapixels matter with modern sensor technology?
added 109 characters in body
Jul
31
comment Filtering out RED light from a white LED source
This question appears to be off-topic because it is about LEDs and light filtration not in a photographic context.
Jul
31
comment Can anyone identify the manufacturer of this golden lens?
@Andrew true, but the point is there is with stills you can usually upgrade to a larger format / higher resolution sensor when you want a wide image, whereas shooting moving pictures on film this isn't possible (the cost of moving from 35mm to 70mm for a production would be pretty huge). with digital cinema cameras now sporting resolutions of 5K and upward this restriction doesn't exist, if anamorphics are used it is for effect, either for the squished bokeh or lens flare (see any J.J. Abrams film).
Jul
31
answered What is this “rushed inwards” type of photo called?
Jul
31
revised What is this “rushed inwards” type of photo called?
edited title