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03-26-2011, 11:03 PM   #1
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Fisheye versus DA 16-45mm

I have DA 16-45. I am looking for a lens that has deep depth of field, so I can use it without worry to get my subjects in focus. Does 16mm fisheye differs from the 16mm lens I have regarding DOF. Or I need to get shorter lens like 8mm?

03-26-2011, 11:36 PM   #2
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Probably you need to decide if you want a fisheye or not first. It's a fairly big difference from a rectilinear lens. You can get lots of DOF in both fish and non-fish lenses.
03-27-2011, 04:57 AM   #3
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I think you would probably prefer the 16-45. The fisheye is a fisheye. It curves your plane of view in order to fit more in and creates a lot of distortion at the edges. At 16mm, it is quite a bit wider than the 16-45 is at 16mm, but that doesn't matter if all the people in your photos end up looking like Humpty Dumpty.
03-27-2011, 06:23 AM   #4
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Far easier is to shoot stopped down. If your shooting a 16mm at f8 or f11 you should be getting almost everything in focus anyway.

Shooting with a wider lens won't improve the depth of focus if you end up cropping to get the same angel of view. If your cropping to get the same image, the DOF will be only dependent upon the apature you are using.

03-27-2011, 06:39 AM   #5
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Well I've yet to try the 16-45 in real person, but I can tell you that the 8mm ( I'm assuming you're looking at the peleng 8mm circular fisheye ) has everything in focus at 3.5 focused at infinity.
03-27-2011, 07:14 AM   #6
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QuoteOriginally posted by Junyu Quote
Soon :-
K20D, BG2, Peleng 8mm
if you want a fisheye you should look for the Samyang...not the peleng...The samyang is cheap too but it got great Image Quality, much better than the peleng (there are comparisons online). If you want a circular one, there are some fine Sigmas out there but it can get quite pricey.

QuoteOriginally posted by vanakaru Quote
Does 16mm fisheye differs from the 16mm lens I have regarding DOF. Or I need to get shorter lens like 8mm?
As said before just stop down your 16-45, shoot at f8 and on to get deep DOF...but if to what you refer is angle of vision (how wide you can go), you will need an Ultra Wide Angle to get a wider rectilinear lens or a 10-17 or 8mm fisheye.
If it's to wideness to what you refer you should look into the 10-20, 12-24 and 10-24 (Sigma,Pentax and Tamron).
03-27-2011, 08:21 AM   #7
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QuoteOriginally posted by Coeurdechene Quote
if you want a fisheye you should look for the Samyang...not the peleng...The samyang is cheap too but it got great Image Quality, much better than the peleng (there are comparisons online). If you want a circular one, there are some fine Sigmas out there but it can get quite pricey.


.
I've tried the Peleng and the Samyang. I prefer the Peleng. Image quality wise, I feel that there is no obvious differences.
But of course it all comes down to personal choice.
03-27-2011, 10:33 PM   #8
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Yes, I have been looking for Samyang 8mm and 12mm. My favorite photo store will be the official seller for these, but not available yet. I could get one from eBay even cheaper than in the store here but I would like to try first or find out if I need one at all.
So far I understand that I would get more circular distortion + deeper focus range than with my 16-45. Also Samyang and Peleng are faster lenses f2,8 versus f4-5,6 on DA 16-45 so stopping down would be easier.

03-28-2011, 04:48 AM   #9
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QuoteOriginally posted by vanakaru Quote
I would get more circular distortion + deeper focus range than with my 16-45
You will get circular distorsion...not "more" since the other lens is rectilinear and ain't got much distorsion.
And the "deeper focus range" has to do with the fact the they are way wider...That does not mean you cannot get deep field of view with the 16-45 (with the Samyang you will get deeper FOV at bigger apertures while you will need to stop down the other lens.)
QuoteOriginally posted by vanakaru Quote
stopping down would be easier
Stopping down will be as "dificult" as with the other lens. I explain myself, you can set smaller apertures with any of the lenses, it's not "easier" with the fisheye... The fisheye is faster but it's a totally different lens than the 16-45 and it's not rigourous to compare it.
If you like fish eye's go for it. The lens is really fun, not for every occasion, and kind of difficult to find uses where it will add something to the shot, but a great fun.
03-28-2011, 06:00 PM   #10
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A fisheye will give you focus from a few tens of cm to infinity easily :




SMC PENTAX-DA FISH-EYE 10-17mm F3.5-4.5 ED[IF] at f5.0 and 10mm
03-28-2011, 11:31 PM   #11
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QuoteOriginally posted by kh1234567890 Quote
A fisheye will give you focus from a few tens of cm to infinity easily.
SMC PENTAX-DA FISH-EYE 10-17mm F3.5-4.5 ED[IF] at f5.0 and 10mm
OK. That is what I am after. Deep focus depth and nice distortion. So 10mm fisheye would be about the ideal.
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