Red and Blue

by Gordon

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72,280 reputation
3112278
bio website neocamera.com
location Montreal, Canada
age
visits member for 4 years, 7 months
seen 15 hours ago

Freelance travel photographer, photo tour leader and digital camera guru.

Travel has always been my passion and photography lets me share it with everyone.


May
20
comment Why is my Sony A57 creating low res JPGs?
You are complaining about the resolution yet you mention storage space. What is in fact the resolution? You should see this in the Properties dialog or with any program that shows EXIF. If using nconvert just use nconvert -info <filename>.
May
18
comment Nikon D3200 18-105mm VR Lense and macro photography
@Lanka - It's just historical. Macro is from the lens' perspective (takes a small subject and makes it big) and Micro is fro the subject's perspective (takes photo of a small subject). A related term 'microscope' is some that lets you see small things.
May
10
comment How to take a photo of a close-up object without focus stacking?
Right, small sensors have a lower diffraction limit which is why most compacts max out at F/8. Some have slightly larger sensors and offer F/11 which maintains sharpness reasonably.
May
9
comment Adjust exposure compensation in manual mode?
It it only adjusts the displayed meter and does not actually change exposure, which is one reason why this can be confusing.
May
5
comment Are there cameras that autofocus during an exposure?
With exception to the Canon EOS 70D, they use Contrast-Detect AF which can easily be detected by the back and forth movement of the lens when out-of-focus. The camera measures contrast and moves the lens to see if it increases. If it decreases, it starts moving the lens the other way. Sony SLT cameras were designed exactly to avoid that problem. Canon fitted the 70D with phase-detection at every pixel so it can continuously adjust focus while filming. For video, one should really focus manually because any misfocus, including locking focus on the wrong subject, will be visible in the film.
May
1
comment Are Manfrotto Q6 Plates Compatible with Acratech GP-ss Ball-Heads?
@DanWolfgang - Sounds like you know more about this! There is no information saying that the plates and clamps are not designed to be interchangeable, which is easy to imply by how they are named. Perhaps you can contribute details as an answer?
Apr
29
comment Is the Gorillapod sturdy enough for super-zoom lens and long exposure?
That's a tough question because I own 5 cameras and am constantly rolling through review units! Overall, the Gorillapod works extremely well with Ultra-Zoom Bridge Cameras and Mirrorless with medium-sized lens. For a DSLR, my lenses are mostly too big to get good stability, even with the SLR-Zoom.
Apr
15
comment How many stops are there between middle gray and white point?
Not only this varies by camera (otherwise they would all have the same DR), it also varies by setting (Contrast, Tone, etc). So I'm going to say impossible to answer.
Apr
15
comment Why is the field of view of my lens narrower than my calculations show it should be?
The focal-length varies with focus and is usually quoted with focus at infinity. Try changing focus. Also, are you measuring the height from the sensor-plane?
Apr
4
comment Why does Nikon D3100 makes occasionallly noise and viewfinder shifts when pressing shutter button
Try disabling stabilization on the lens to see if that is the source. It's the only thing than can shift your view through the OVF.
Mar
15
comment Can I use Canon lenses on a Nikon dSLR?
Nice and thorough answer!
Mar
1
comment Inconsistent exposure with same settings--why?
Clouds moving???
Feb
28
comment Can changing metering mode change focus?
What were the selected shutter-speeds and ISO? Those are the variable we are missing.
Feb
26
comment How to match colors on photographs stitched together?
OK. EV stands for Exposure-Value, so equivalent ISO, Shutter-Speed, plus Aperture. That should make the exposure match but the colors will not if you were in Auto WB. Of course, since you shot RAW, that is only the default and you can override it at development time.
Feb
26
comment How to match colors on photographs stitched together?
Absolutely. Manual settings are better but the grey card allows you to match the levels after the fact, so I thought it was good to mention.
Feb
26
comment How do I zoom in during image playback on a Nikon D3300?
That is odd.... how can you zoom out in review? Is the image already zoomed in? I have a D5500 with me and at the review one can initially zoom in but not out.
Feb
23
comment What publicly-accessible high-elevation photography-locations exist in New York City?
Is there a good surface for a bean bag with unobstructed view? Or would a Gorilapod fair better?
Feb
22
comment What publicly-accessible high-elevation photography-locations exist in New York City?
Great, thanks! Points for unusual locations and access details.
Feb
16
comment Does lens focus affect the appearance of sensor dust?
Interesting. This reminds me that the sensor is sensitive to light angle and the most significant change in designing lenses for digital is to make most rays hit the lens perpendicular to it.
Feb
14
comment What publicly-accessible high-elevation photography-locations exist in New York City?
@JohnCavan Was there a tripod below your K-5? Did you see any tripods being used around?