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09-12-2010, 10:45 AM   #46
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Marc, forgot to add, these are the 100% crops as well. But you probably knew that any way,
Cheers.

09-12-2010, 01:06 PM   #47
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Maybe not "macro" but not bad for a kit lens. This is the original version of the kit, shot with my K110D



09-12-2010, 02:43 PM   #48
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There are important geometric optics differences between macro and non-macro photography.

For example, non-macro (far field) photography, DOF as a percentage of field width depends on magnification, M (field_width/sensor_width), while for close, macro (near field) photography, it does not.

The equation can be reduced to:

DoF%=Constant*F-Number*(1+1/M) {I've ignored very small hyperfocal effects here..}

For example, changing M by 10% when M=10 changes DoF% by about 0.08%, while when M = 1/10 a 10% change in M changes DoF% by about 9% (10,000x more fractional change).

Unfortunately there's not a single, precise magnification where things switch from one kind of behavior to the other, so we argue about 1:1 vs 1:2.


Dave

PS it really doesn't matter much in modern photography as one can instantly and inexpensively make test exposures. It makes a big difference when each test shot costs an hour in the darkroom!
09-12-2010, 02:48 PM   #49
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I've wondered about your screen name, now I understand.





09-12-2010, 08:55 PM   #50
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QuoteOriginally posted by stanic Quote
these are all cropped, showing the 18-55 kit lens ability....as long you don't have money for macro lens, the kit lens is quite okay
stanic's Album: shroomy - PentaxForums.com
I'd say the kit lens is more than OK based on those images. Thank you for sharing them and thank you to all the others who have demonstrated here what the 18-55 kit lens is capable of.

I have the original version which came with my K10D and I have always liked it but after looking at some of the images here I value it even more and I realise that it can be used in more situations than I had thought.

I know it is not a macro lens (I have a proper macro lens and I know what they can do) but as a kit lens it has nothing to be ashamed of.
09-13-2010, 11:58 AM   #51
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KX newbie

Some of the macro shots on here are amazing - especially the dragonfly.
Having gone from manual SLR to point & shoot digital then to my new KX it is a fun learning curve, but am pleased with a few macro shots I have taken at the weekend.
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