A little more than a year ago I wrote a rather popular blog post on how to correct the colour cast caused by the Lee Big Stopper. If you’re not a regular reader but clicked through to this post, odds are that you are familiar with the blue cast caused by the filter and are looking for a way to correct it. If not, I … Continue reading Correcting the Lee Big Stopper Colour Cast
[Update: a related post has been added, where I document two new arguments to the RGB decoding/encoding scripts.] [Update (5-Jun-2018): edited to include equivalent dcraw extraction method.] Some time ago I wrote a blog post demonstrating that it’s possible to change the image content of a camera RAW file, thereby making it clear that the RAW file itself is insufficient evidence of authenticity. I achieved … Continue reading Scripts for Reading and Writing Canon RAW files
A bit of a technical post this Thursday, on something I’ve written about before, but always meant to revisit. It’s taken a while, and though I upgraded to a full frame camera more than two years ago, this experiment has fallen down my priority list. I won’t get into the ‘which is better’ argument, since it all depends on what the user wants out of … Continue reading Full Frame vs Crop Sensors Revisited
[Update: a related post has been added, where I make available the scripts for reading and writing Canon RAW files.] What if I told you that I could write a camera raw file, after editing the content? Would that change anything? I’m thinking most people’s answer is probably some variant of “really? I thought you couldn’t edit a camera raw file.” Assuming they know what … Continue reading Editing and Writing Camera Raw Files
Today’s post is one for the pixel peepers. Well, not just, perhaps. It should really be of interest to anyone shooting digital who wants to maximize the sharpness of their images and essentially get the best they can out of the gear they already own. Image quality is mentioned a lot in photography circles, mostly by gear-heads, but it’s not an issue to be dismissed … Continue reading Comparison of RAW Format Conversion Software
This blog post has been some time coming. A couple of weeks ago I read a discussion post on Leanne Cole’s blog about the difficulties of choosing the right monitor and calibrating it. I left a note there saying that I’d be writing up a blog post about this because it’s such an important topic and most people wouldn’t even know where to start. I … Continue reading Working with Colour
Yesterday I gave a presentation at the weekly meeting for the University of Surrey Photographic Society. After discussing the content with the president I chose to go with a few slides on my methodology for landscape photography. It’s not that I consider myself an expert, but this is one topic that I’ve devoted more attention to in the last few years, and I thought a … Continue reading Managing Exposure
[Update: if you’re wondering about the initial choice of filter system, I wrote something about this in a much earlier post.] A rather technical post today, about a problem that is likely to be of interest to others, in particular to those interested in landscape photography. Specifically, this is about the use of a polarising filter with the Lee 100mm system of square and rectangular … Continue reading Polarising Filter for Lee 100mm System
[Update: a more recent post gives a more accurate comparison between full-frame and crop sensor cameras.] Earlier today I made an off-hand comment on how you need to multiply the f-number by the crop factor on a crop-sensor camera to get the equivalent aperture for a full-frame. This is just like you need to do with the focal length of a lens, a concept which … Continue reading Crop Sensors and Aperture
I took an interest in photography before cameras went digital. And it took me a few years to go digital myself. The inevitable result is that I have lots of negatives with my earlier shots. Scanning these seemed to make sense, so I have been playing with films scanners and their related software for quite a while. I was never quite satisfied with the whole … Continue reading Scanning Negatives
I had an interesting comment this week on my recent Guildford Castle photo (thanks to Andy for allowing me to share): An interesting point: the white balance looks “normal” but I’m wondering if the pinky colour was genuinely there (it was just past sunset, after all). Daylight WB is usually pretty accurate and will show colours the way they actually / “scientifically” were rather than … Continue reading White Balance
Yesterday the PhotoSoc had a great lecture/demo on film (link is members only, I’m afraid), and someone asked about the possibility of using Canon EF-S lenses (you know, the ones that are made for the APS-C digital bodies) on a film (ie full frame) camera. I claimed it was not possible, so did some digging this morning to double-check. As it turns out, quite a few … Continue reading On the Canon EF-S mount
Muddy Boots 