carla_d wrote:some examples (i've posted them at 1000px i hope that's not too large..)
It actually is. No more than 800px on the largest side, please. Also, it's a good idea to dumb down the actual file size as your preparing to post images. I just looked at the first one, and it was nearly 1MB. We need to consider that not all of our members are on broadband, and this sort of image can become quite a burden in terms of their download capabilities. Probably something we also need to consider now with the iPhone available, and the piss poor data allowances provided by the carriers. This one post would blow an entire month's data allowance on the base Hel$tra plan!
While we're housekeeping, please also, could you put a meaningful location into your profile? "Sydney" doesn't cut it. Please look at the
FAQ and the New Members message on the Portal Page for more details about what is acceptable. Thanx for your future cooperation on these matters.
20mm f13 1/30sec 640 iso. I was expecting the f-stop to increase dof but... things in the foreground seem kinda soft
A couple of points here. Yes, a higher f-stop value will increase the DoF, but that applies depending upon where your actual point of focus might be. DoF is a range around that point of focus within which the image will be within acceptable focus, and that will be a little bit in front of the point of focus, and a little behind that same point of focus. It doesn't apply, globally, across the whole image.
In this instance you don't tell us where the point of focus is. I'm seeing that the word "King" in "Burger King" appears to be in quite sharp focus, and thus I'm going to suggest that this might be where your plane of focus might lie. If that's the case, then I think it's reasonable that the display stand in the foreground is out of focus, because I would not expect this to be within any extended DoF range for that focus point.
I note too that this was shot at 1/30; this may also be a contributing factor; it's about the minimum shutter speed you should be using handheld with this lens; camera shake does start to factor in to images and perhaps this may have been an issue here as well?
One final point on this image ... f/13 is probably beyond the sweet spot for this lens; I generally see the best performance of a Nikkor at around f/5-6 through f/9. It may be an idea to just shoot some test images at a range of aperture settings, compensating shutter speed to match, and comparing those results.
the focus point on the following was her eyes - perhaps it's the high iso setting, i don't know, but it doesn't have the same sharpness as the following image shot with my 35mm lens (focal point was the eyes for both). is it just that there was more light in the second shot?
No. This looks to be slightly front-focused to me. Very slightly, but at f/4 it's enough to soften the subject.
Look at the hat the lady is wearing: the leading edge of the brim, where it's folded up. Moreso, look beyond that point, at the nearside of the body of the hat, which seems to be in very sharp focus. That's really the side of her head/face, rather than her eye. At f/4, even a slight movement on the
model's part is enough to cause this sort of issue, but equally, it's enough to suggest that calibrating the lens might be a worthwhile option.
What do the areas of the image that I've highlighted here look like when you pixel peep? Does that help further refine the problem?
and here's a night shot
Yep. That's definitely a night shot.
Looks basically fine to me, although my earlier comments about shutter speed might be applicable here. As you approach the lower limits of the acceptable range of shutter speeds, technique comes into play, and you need to start to pay closer attention to the finer details about how you are making your exposure.
Posted: Fri Jul 25, 2008 6:45 pm
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