Wide aperture - Pictures out of focus

Started 4 months ago | Discussions thread
tedolf
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Faster shutter speeds........
In reply to Christof21, 4 months ago

Christof21 wrote:

AnthonyL wrote:

Jizzy wrote:

tedolf wrote:

So, stop down to about f/8 and you will get a DOF of about 8-10 inches.

Now, you have to ask yourself why did you spend so much money for a f/1.8 lens when you really can't use it wide open for the types of photo's you want to shoot!

TEdolph

Yeah, thats what I am asking myself now

Yes - just get a P&S - no probs with DOF there!

Or stop down the lens, same results. This is not a "problem"

There are some situations where you can't stop down. Like where you need a faster shutter speed to avoid subject motion blur, e.g. father/daughter waltz at a wedding.

The "problem" is that you are paying a lot of money for a fast aperture that is usable only in very rare circumstances.  I think a lot of beginning photographers get "suckered" into paying a lot of $$ for a really fast lens when an f/2.8 lens of the same model would cost a lot less and work just as well in the real world.

It is worth spending a bit of time checking what your lens can do wide open and stopped down a touch. But as pointed out elsewhere the focus confirmation can kick in sooner than you think and not necessarily on what you thought it focussed on. Use static subjects and if you haven't got a tripod then find something to stand the camera on and use a time delay.

Also double check your technique. Need to be very precise and steady.

Tedolph

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