Shutter Speed Witm 135mmf/2 & 20d

[pmarz]

When I use my 20d coupled with my Canon 135mm f/2 l lens in bright outside light I get extremely high shutter speeds. 1/8000th of a second is not unusual and the photos are turning out great. Are shutter speeds this high real, or is my 20d giving me bad info?

Thanks
Pete

[DocFrankenstein]

lol

They're real. Bright sunny day... U should see what 50/1.4 is gonna give you. :D

[CyberDyneSystems]

Yeah,. that f/2 is letting in boatloads of light!

You can allways dump your ISO down to 100 if you are set any higher.

[timmyquest]

i've seen my 1D hit 1/16,000 on a sunny day at ISO 200 f/2

WHo says those speeds arnt needed

[pmarz]

Thanks guys, I had a friend tell me those shutter speeds weren't likely. I suspected they were real because the f/2 showed normaly low shutter speeds in poorly lit situations.

[Andy_T]

Tell your friend to get a decent lens :lol:

Best regards,
Andy

[CyberDyneSystems]

Yeah,. if your used to a zoom with a max ap of f/5.6 then it may seem hard to swallow. :)

[lmelendez]

Tell your friend to get a decent lens :lol:

Best regards,
Andy

LOL... that was funny

[12345Michael54321]

Thanks guys, I had a friend tell me those shutter speeds weren't likely.
Nothing unlikely about them, as a rudimentary understanding of the f/16 Rule illustrates:

Bright, sunny day. ISO - 100 : Proper exposure around 1/125 sec. @ f/16.
Which is equivalent to 1/250 sec. @ f/11. Or 1/500 sec. @ f/8. Or so on, down to 1/8000 sec. @ f/2. (I'll leave conversions for other ISOs as a very basic exercise for the student.)

It's in situations like this that having a neutral density filter handy can be a good thing, should one wish a minimum depth-of-field shot under extremely bright conditions. (Even a polarizer can cut close to 2 stops of light from reaching the film/sensor, in a pinch.) Granted, this tends to be less of an issue on a camera with a top shutter speed of 1/8000 sec. or faster, than on older models that top out at 1/1000 sec.