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Forum: Pentax SLR Lens Discussion
11-12-2017, 12:39 AM
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Of course the meal is bigger, you've got more money to spend on it since you haven't bought the FF body for $$$$!
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Forum: Pentax SLR Lens Discussion
11-11-2017, 01:45 PM
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Some of you guys get so offended so quickly. Just like in the 11-18 thread, you're being pathetic again.
Live and let live.
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Forum: Pentax SLR Lens Discussion
11-11-2017, 02:20 AM
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Turns out that Ricoh/Pentax know what they're doing (while internet togs don't), quel surprise!
:p
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Forum: Pentax SLR Lens Discussion
11-10-2017, 12:25 PM
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Forum: Pentax SLR Lens Discussion
11-10-2017, 11:40 AM
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I've got one but haven't thought to carry it :lol:
The 18-135 goes into the bag instead but never gets any use!
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Forum: Pentax SLR Lens Discussion
11-10-2017, 11:04 AM
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On that note, the KP with the DA15, DA40XS and the FA77 is an unbeatable kit. I actually prefer it in lieu of the K-1 if I'm going to be walking for a while. Otherwise I know that the K-1 is amazing with the A20 and FA85. My FA31 sees very little use in comparison to my other stuff.
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Forum: Pentax SLR Lens Discussion
11-10-2017, 10:27 AM
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I'll just add my 2 cents on the equivalence discussion.
I jumped onto the photography train (to bankrupcy) in the summer of 2015 when I could finally afford my own DSLR. I luckily chose the Pentax K-3 as my camera since it was on offer and had great features. I bought the DA 18-55, DA35, DA50 and Sigma 70-300 lenses with it. The 35mm for me was a wide-ish lens while the 50mm was a tight lens. The 18mm end of my zoom was my wide angle while the 300mm was my telephoto.
And that's all I needed to know to be happy with my shooting.
Two years on, I've got a K-1 and more lenses than I can count. I still take crop factors into account for my lenses on the K-1 or KP (e.g. My A20/2.8 gives me the same FoV on the K-1 as a 13mm lens would on APS-C). It's an automatic thing. I really don't care much for DoF equivalence because I'm going to try and use the best lens I can possibly use for each system. But when it comes to FoV equivalence, it's taken me a while to get used to facts such as 28mm being a pretty wide angle on FF.
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Forum: Pentax SLR Lens Discussion
11-05-2017, 10:45 AM
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The sharpness result is also quite amusing. I wonder what their testing methods were. I'm pretty sure they've produced a video about it but I don't want to waste my time listening to it!
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Forum: Pentax SLR Lens Discussion
11-05-2017, 10:24 AM
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Perfect response.
The total amount of light hitting a sensor isn't the same as the light intensity per unit area (lux) on the sensor. A fixed aperture doesn't change the light intensity per unit area, so your Sunny 16 rule works equally well with a K1000 as it does with a Pentax Q.
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Forum: Pentax SLR Lens Discussion
11-05-2017, 09:18 AM
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If you want to compare DoF then you need to make sure your field of view is the same.
I can snap an image with a 200mm f/2.8 on the KP and the 300mm f/4 on the K-1 and the images should be very similar in terms of field of view and depth of field, as long as the subject is at a similar distance. If I then take the 200mm f/2.8 lens and put it on the K-1, in order to get a similar field of view I'll have to move forward. In this case the depth of field will be thinner as it is a function of subject distance, focal length and aperture.
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Forum: Pentax SLR Lens Discussion
11-05-2017, 09:09 AM
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This sounds 'scientific' but many of the claims are misleading. He can stick to his Canikon crowd.
His first claim about multiplying the focal length AND aperture by the crop factor is wrong. He's obviously not going to explain what he means by it (or maybe he just doesn't know).
If I'm using the 70-200/2.8 on my KP, it behaves like a 105-300mm lens in terms of focal length and an f/4.2 lens in terms of effective DoF (compared to a FF 105-300mm lens). In terms of light gathering, it's still doing the same work as an f/2.8 lens does SO THERE'S NOTHING WRONG WITH USING IT. The bokeh will be as magnificent as if you're using it on the K-1, you're just not going to get as much of the background in your shot assuming the subject distance is the same in both examples.
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