Alley in Pisa, Italy

by Lars Kotthoff

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bio website mattgrum.com
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visits member for 3 years, 10 months
seen 7 mins ago

Jan
3
comment Printing rotated pictures
Now I think about it I've definitely printed both portrait and landscape oriented photos in labs in the UK, since I edit most of my photos I'll always rotate them to the correct orientation in order to work on them.
Jan
3
answered Printing rotated pictures
Jan
3
revised Is it worth to upgrade from Canon 50mm f/1.8 to Canon 50mm f/1.4 on 550d?
added 816 characters in body; added 1 characters in body
Jan
3
revised Is it worth to upgrade from Canon 50mm f/1.8 to Canon 50mm f/1.4 on 550d?
added 774 characters in body
Jan
3
answered Is it worth to upgrade from Canon 50mm f/1.8 to Canon 50mm f/1.4 on 550d?
Jan
3
awarded  Enlightened
Jan
3
comment What are backup options for the lazy but paranoid dSLR user?
I'm not familiar with Unison though I will check it our - for various OCD-esque reasons I like to be in total control of my backup solution so I prefer to write my own software, in addition to owning the hardware. Fortunately writing a script to sync to files isn't too hard!
Jan
3
comment What are the dangers of removing a lens while the camera is on?
@lindes Think about it this way, if the sensor cleaning mode somehow kept the sensor in an uncharged state, why does the camera not keep the sensor in this state all the time, since keeping the sensor uncharged ought to drain the battery less...
Jan
3
awarded  equipment-recommendation
Jan
3
comment What are the dangers of removing a lens while the camera is on?
@Itai Your wife can hear the TV on mute because the amplifier is still trying to amplify the input signal even if the TV is not sending a signal - the noise on the line gets amplified. A camera is not a mains powered device, keeping the sensor powered on all the time seems like a bad idea in a battery powered device. As far as I know the only thing you need to do before shooting is earth the charge from the photosites before opening the shutter, something that is done before any shot anyway...
Jan
2
comment Is it common to have problems with soft images on a 7D?
Surely Moire is less of a problem as resolution increases. Moire is the result of aliasing (hence the "anti-aliasing" filter) which is worse when the sampling frequency is close to the spatial frequency of the scene detail. Increase the sampling frequency for the same scene and aliasing is less of a problem. In music production anti-aliasing filters are less important when using a higher sampling frequency in the AD conversion (e.g. 96khz instead of 44khz) which is analogous to a higher resolution sensor.
Jan
2
answered What are backup options for the lazy but paranoid dSLR user?
Jan
2
revised D80 vs D100 vs D1X
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Jan
2
answered Really? Why does a Nikkor 35mm f/1.4 cost almost $2,000?
Jan
2
answered D80 vs D100 vs D1X
Jan
2
comment What are the dangers of removing a lens while the camera is on?
Why does my explanation seem contrary to common sense? Common sense says to me that when the sensor is not doing anything, there's no current flowing through it and thus no charge.
Dec
31
comment Is it common to have problems with soft images on a 7D?
The 50 f/1.2 is not a good lens to evaluate sharpness with as it's relatively soft wide open and exhibits focus shift when stopped down - I'd use a macro lens, either the ef-s 60mm or the 100 f/2.8L
Dec
31
comment What are the dangers of removing a lens while the camera is on?
Hmm seems to be a Nikon thing. What does it say under manual sensor cleaning? Are you supposed to turn the camera off, remove the lens, turn it back on, open the shutter and then clean the sensor?
Dec
31
comment Will using a lens at max aperture (“wide open”) result in poor images?
Seems to be the same situation with Nikon: dpreview.com/lensreviews/widget/… the 50 f/1.8 is the sharpest of the bunch at f/1.8
Dec
31
answered Will using a lens at max aperture (“wide open”) result in poor images?