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Forum: Pentax DSLR Discussion
09-13-2007, 04:34 AM
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I have a samsung gx-10. I am new to DSLR photography, so am not really qualified to comment on the relative quality of one jpeg over another but the thought processes I went through we as follows:
1) I want a DSLR camera to replace my film Pentax MZ-5N. I initially decided I wanted to stay with Pentax so I could use my old lenses and flash.
2) Do I buy a K100D or a K10D - well, more MP's the better (although not always true of course) and the larger feature set of the K10D appealled (although there are currently more functions than I know how to work hence I have enrolled on a course which I have mentioned elsewhere).
3) I was all set to buy the K10D when my old man pointed out the GX10. Same camera but for £200 UKP less! Simple choice - who cares whether the name is Korean or not! I can't really comment on service as I haven't needed it.
I read a tip which said always shoot RAW, so I do as it allows me more flexibility when I get back to my Mac with a big monitor to view the shots on. With a 4Gb SDHC card, I can get 280 RAW shots and the card cost me less than £20 UKP including reader. I managed for a whole fortnight on holiday without changing the card (although it was getting tight by the end) but it all depends on how many photos you are going to take between uploads.
OK, so I don't have PEF. I thought DNG was supposed to be a standard but it seems not to be as standard as I thought - my Mac won't natively read them so I can't use Aperture, but Adobe does so I can use that - it does mean I have slightly less choice, but I am hoping they will fix that in an update but it does depend on what your workflow is and what platform you are using.
HTH
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Forum: Pentax DSLR Discussion
09-13-2007, 04:05 AM
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You could try contact lenses? Not sure if they are available where you are, but I wear extended wear (silica hydro-gel) lenses which I don't need to change for 28 days - I even sleep in them.
Have been wearing them for about 7 years now (not the same pair or constantly of course ;-)) and they have changed my life. I can even wear posh designer sun glasses without having to splash out hundreds for prescription lenses.
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Forum: Pentax DSLR Discussion
09-13-2007, 03:59 AM
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When I look through my view finder, I see things the same size with the lens set to about 50mm as I do when I look with my naked eye. If I set the lens to 35mm, the image in the view finder is definately wider (i.e. the subject looks further away).
Or am I misunderstanding what I should be seeing? Is it all about the angle of what I see rather than the distance to the subject? With my naked eye, I see more on the periphery of my vision than I do looking through the lens when the lens is set to 50mm.
Sorry if I am being stupid, I am just trying to understand how all this optical stuff works and we all have to start somewhere...
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Forum: Pentax DSLR Discussion
09-12-2007, 08:55 AM
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Forum: Pentax DSLR Discussion
09-12-2007, 04:46 AM
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Thanks for all your replies. I think maybe I am confusing myself. Is it right then that I cannot compare a film lense and a digital lense on the same camera? The field of view that people talk about would only become apparent if I took the two photos on the different media, i.e. film and sensor? Its not directly the affect the lens has on the image being projected through it, but what effect the camera has on the image as it is captured - i.e. the digital sensor would capture less (because it is smaller) and therefore when the resulting image is enlarged to the same size, the subject would appear closer?
What really started it off was the comment by my lecturer about what was a 'standard' lens, i.e. 50mm on a 35mm camera was considered standard, but on a digital one, 35mm was nearer to standard. When I looked through the VF, it seemed to me that 50mm was nearer the mark on my camera, the lecturer took a look, agreed and thought it was a bit strange.
Picking up what one reply said about 'feel', does this only apply if I took the two photos on different cameras and then enlarged the resulting photograph to the same size, the digital camera image would appear as though it was taken with a longer lense on the film camera?
I guess I am most concerned that what I see through the vf is pretty much what I am going to be capturing on the senser.
Many thanks
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Forum: Pentax DSLR Discussion
09-12-2007, 02:42 AM
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Hi all. New to the forum, so apologies if I don't follow etiquette or am going over something which has already been discussed (I did search first honest!). Also I hope it is OK to discuss the Samsung GX-10 as it is of course the same as the K10D.
I am new to DSLR photography and have just started a course. One of the first things we learned was about the focal length multiplier and how that affects the focal length of our lenses and how they compare to 35mm film equivalents. We learned what was a standard lens (50mm FL) and how on a DSLR, standard is more like (35mm FL). I am the only one in the class with a Samsung and I discovered that standard on my lens was about 50mm despite the 1.5x multiplication factor.
So, I did some tests using my kit 18-55 D-XENON and an older 28-80 film lens from my old Pentax MZ-5N. Setting both lenses to 28mm, the two pictures attached are almost identical. My understanding is that the digital lens should appear closer than the same focal length on the film lens because of the image circle it generates?
Has anyone else come across this or am I missing something due to my lack of understanding? It seems to me that the D-XENON lens (and presumably the Pentax equivalent is the same) are marked with their film equivalent focal lengths? The D-XENON lens definately isn't a film lens as the image circle is smaller - I put it on my MZ-5N and there is clear vignetting in the view finder when at the widest setting.
Does this perhaps explain why my kit came with both the 18-55 and the 50-200? Perhaps the next test I should do is to take the same photograph with the same apparent FL on two different cameras and compare? I would expect to see mine being wider, right?
Any thoughts gratefully accepted.
Many thanks
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