Just an obscure corner of the ‘net where I post random stuff – at the moment my focus is on photography, IT and SEO and maybe a bit of quantum physics.… Read More
XQD and CFExpress
I’m very eager to migrate over to CFExpress. I have had to replace a couple of XQD cards and they are very expensive these days. While I’m waiting, I did a bit of research into the history of the XQD format. XQD The format was jointly developed by Sony, Lexar, and Sandisk as a replacement… Read More XQD and CFExpress
Bash: Some Date Functions
Some of the date functions I have had to use recently in bash shell Get Current Date today_date=$(date ‘+%Y%m%d’) (in format YYYYMMDD) Get Yesterday yesterday_date=$(date -d yesterday ‘+%Y%m%d’) (in format YYYYMMDD) Get Day of Week dayOfWeekNumber=$(date +%u) (1=Mon) dayOfWeekName=$(date +%A) (Friday) Could pass in a specific date: dayOfWeekNumber=$(date -d”20190821″ +%u) or a variable: dayOfWeekName=$(date -d”{dateToCheck}” +%A)… Read More Bash: Some Date Functions
SQL: Difference Between UNION and UNION ALL
UNION removes duplicates, UNION ALL does not. UNION thus requires more resources.
Concerns over the Leica Q2
Here are the things I’m concerned about before I can say I will invest in the Leica Q2. … Read More Concerns over the Leica Q2
Have Leica broken Back Button Focussing on the Q2?
In his write up of the Leica Q2, Jonathan Slack describes how the small “zoom/lock” button on the back of the camera (near to the thumb indent) can be assigned the following functions: Digital Zoom, AEL / AFL, AEL or AFL. He then goes on to describe how when the the AFL function is chosen,… Read More Have Leica broken Back Button Focussing on the Q2?
Why I’m OK with Crop-Zooming on the Leica Q2
Why I’m OK with using the 50mm digital zoom crop on the Leica Q2 for street portraits.… Read More Why I’m OK with Crop-Zooming on the Leica Q2
Sensor Crop Factors
Crop factors for common sensor sizes.… Read More Sensor Crop Factors
Leica Q2 Crop Options
The Leica Q2 is a 47 megapixel full frame camera, which by default produces a 3:2 aspect ratio image of size 8368 x 5584 pixels from its 28mm lens. It also offers the option to crop to 35mm, 50mm and 75mm equivalents – this is by overlaying crop guide lines in the EVF and back… Read More Leica Q2 Crop Options
An approximate lens formula: i/f = o/d
Use this formula to get an idea of what lenses will work in what space, what area of subject a lens will cover at closest focusing distance.… Read More An approximate lens formula: i/f = o/d
Light and the Inverse Square Law
At some point in your photographic life you will inevitably come across something called the Inverse Square Law (ISL), which relates to light fall off with distance and how that affects exposure. A lot of photographers are put off by this mathematical construct, and while the physics behind it is relatively complex, its quite easy to understand and apply.… Read More Light and the Inverse Square Law
