Alley in Pisa, Italy

by Lars Kotthoff

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1,560 reputation
519
bio website
location United Kingdom
age 30
visits member for 3 years, 10 months
seen 4 hours ago
I'm a PhD student in computational biology at the University of Birmingham in the UK. I've been programming steadily for nearly 15 years, though rarely professionally. I started programming in C, took an unpleasant detour through VB6 then learnt Java, C++ and most recently, Python.

Jul
2
awarded  Curious
Jun
30
asked Can long/heavy lenses deform the lens mount?
Jun
25
accepted Quickly reset EC on Canon 600D
Jun
24
asked Quickly reset EC on Canon 600D
Apr
3
answered How long is too long to leave the shutter open before prolonged exposure to light damages the sensor?
Apr
1
comment How to cover all your needs with just one lens?
If you shoot Canon and have an extra ~$2700 to spend, look no further than the 28-300 f/4-5.6L IS USM. This is probably the widest range wide-to-supertelephoto zoom lens that still produces decent images. If that sounds ridiculous (because it is, for most people), perhaps something like an 18-200 lens would fit your needs. These can be had cheap, but won't win any image quality prizes.
Mar
27
comment Where to fix Canon lens, other than Canon
Also, the 70-200 2.8L IS II is a pretty hard lens to service (lots of elements, IS group, weather-sealed). I wouldn't necessarily trust a third party shop to get it right, not on lenses of that much complexity and cost.
Mar
15
comment Is there any reason to prefer a T3i if a T4i has the same price?
The T4i also has a touchscreen interface, which is apparently really nice to have.
Mar
15
comment Why does my Canon 7D get blurry pictures with a 70-200mm f/2.8 IS (series 1)?
No, no, you're not getting it. What I'm saying is, that before going out and buying/renting focus adjustment software/hardware, why not check if there are other issues with the lens by taking a photo using CDAF in live view. It could be a decentered element, for instance, not unheard of in used lenses. Generally, I'd try to eliminate those problems that don't require me to spend any money first!
Mar
15
comment Why does my Canon 7D get blurry pictures with a 70-200mm f/2.8 IS (series 1)?
Yes, but it would tell you if the lens was faulty...
Mar
14
comment Why does my Canon 7D get blurry pictures with a 70-200mm f/2.8 IS (series 1)?
@jrista: Would it be better to use CDAF in Live View against a stationary target to test whether the lens indeed needs AFMA at all? From everything I've read on this site, CDAF is close to 100% accurate and doesn't suffer from front/back focus issues.
Mar
14
comment How do lens lineups vary across Mirrorless camera systems?
With the release of the A7/A7r, Sony's E-mount has now been split into two (full-frame, designated FE and APS-C, designated E). While (I think) all E-mount lenses will fit the full-frame cameras, only some of them will actually project a large enough image circle to cover the whole sensor. At the date of posting, there seem to be only 5 FE lenses.
Mar
13
awarded  Nice Question
Mar
13
comment What does the pentaprism/pentamirror do?
This might be better off as a separate question, but in a modern DSLR, it is my understanding that the manufacturer-fitted focusing screens are always clear while in a film SLR, split/micro prism screens were often used. So why not do away with them entirely?
Mar
13
accepted What does the pentaprism/pentamirror do?
Mar
13
asked What does the pentaprism/pentamirror do?
Mar
13
comment How can I increase the battery life of my SLR?
What kind of settings are you using to shoot your timelapse? My 30D will easily last the 8 hours if you're say, taking one photo a minute. It'll probably do twice that if I'm careful and turn the LCD off and don't use the flash at all. I'd assume the 70D's battery life would be as good or better.
Mar
10
comment Best and cheapest lenses for wildlife photography?
What is cheap? $100? $500? $1000? You need a long focal-length lens. I'd suggest the Tamron 150-600 mm f/5-6.3, but at $1062, it may be too expensive.
Mar
2
answered What are good gifts between $50 and $100 for photographers?
Feb
25
comment Lens rental opportunities in the US
For me, this is a) too localised, b) too subjective and c) tantamount to asking for a shopping recommendation. I've flagged this for a close.