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Photography The Sony Alpha Thread V39!, The Orange Legion
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kev da man
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 Apr 22 2010, 10:59 AM
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QUOTE(albnok @ Apr 22 2010, 10:42 AM) kev da man: Contrast AF point? There is no contrast detect AF on the A550. It is phase detect AF just like all the Alphas. If you're complaining that the picture appears to have a shallower DOF than what you see in the viewfinder, it is because the viewfinder limits the apparent DOF to F3.2 or thereabouts. This is the same for all film or digital SLRs of all brands, which have AF. The A700, A850 and A900 have changeable viewfinder screens (the A700 viewfinder needs to be changed at a service center but the A850/A900 is user-changeable.) The default screen is the Type G which is bright and shows DOF until F3.2 - any brighter and it will still look like F3.2. The Type M screen is like a classic ground glass - it shows DOF accurately to F1.4! However, if you put a F4.0 lens on it, it will appear to be darker, like a manual focus camera would. a550 does not have contrast AF? hmm that explains why the center point is usually hit-or-miss with its accuracy. i don't have any problems with the viewfinder though, i'm just irritated at the AF accuracy of the a550 at wide open apertures when using the live view. perhaps i worded it wrongly in the first post hahaha. for the record, manually focusing the rig does not seem to replicate this problem so far. perhaps i should use a focus test chart? sony's official response isn't too pleasing.  |
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lwliam
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Apr 22 2010, 11:33 AM
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Your friendly neighborhood photographer
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apa tourguide pulak? hahahha, she's a street promoter for Etude House @ Myung Dong.
albert, yea was a grab shot..
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Banzai_san
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Apr 22 2010, 11:36 AM
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QUOTE(kev da man @ Apr 22 2010, 10:59 AM) a550 does not have contrast AF? hmm that explains why the center point is usually hit-or-miss with its accuracy. i don't have any problems with the viewfinder though, i'm just irritated at the AF accuracy of the a550 at wide open apertures when using the live view. perhaps i worded it wrongly in the first post hahaha. for the record, manually focusing the rig does not seem to replicate this problem so far. perhaps i should use a focus test chart? sony's official response isn't too pleasing. maybe your A550 has a back (or front) focusing problem? I think my A550 may has... but have not really check with the focus chart. |
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kev da man
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Apr 22 2010, 11:39 AM
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QUOTE(Banzai_san @ Apr 22 2010, 11:36 AM) maybe your A550 has a back (or front) focusing problem? I think my A550 may has... but have not really check with the focus chart. if it's that case, i cannot explain it being okay at f/4 and above. besides, in my images, using the same lens, the AF point can be clearly seen before or after the subject LOL. for instance, guy at the mic, delivering a speech, i can get the mic clear OR the guy's earlobes clear, but NOT HIS FRIGGIN EYES in the same shoot. irritating or not? can sony put in AF micro adjustment into the upcoming a750? pls pls pls pls pls pls pls pls!!  This post has been edited by kev da man: Apr 22 2010, 11:42 AM |
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MechaHerc
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Apr 22 2010, 11:44 AM
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thanks albert for the explaination.. btw, albert, do u know how to revert back my raw which previously save as ARW v2.1 to v2.0? i cant repair my old v2.1 arw with DxO lol.. the new ver of DxO still not support ARW v2.1  |
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signither
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Apr 22 2010, 11:45 AM
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QUOTE(Kul | Mo0 @ Apr 22 2010, 12:52 AM) Birthday present ma. I no income also wan. ): i wonder what should i get myself for my birthday next month  |
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MechaHerc
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Apr 22 2010, 11:46 AM
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QUOTE(signither @ Apr 22 2010, 11:45 AM) i wonder what should i get myself for my birthday next month sal 2470 mybe..  |
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Zicron
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Apr 22 2010, 11:47 AM
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QUOTE(signither @ Apr 22 2010, 11:45 AM) i wonder what should i get myself for my birthday next month kata tak nak haul  |
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Banzai_san
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Apr 22 2010, 11:48 AM
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QUOTE(kev da man @ Apr 22 2010, 11:39 AM) if it's that case, i cannot explain it being okay at f/4 and above. besides, in my images, using the same lens, the AF point can be clearly seen before or after the subject LOL. for instance, guy at the mic, delivering a speech, i can get the mic clear OR the guy's earlobes clear, but NOT HIS FRIGGIN EYES in the same shoot. irritating or not? can sony put in AF micro adjustment into the upcoming a750? pls pls pls pls pls pls pls pls!! because when the aperture is wide opened, the DOF is very shallow, hence you can really see if it is focusing the right spot correctly (ie sharp). When the aperture opening is smaller, the DOF is much deeper, hence any misfocusing is a little more forgiving... ie can look sharp even if it is slightly out of focused This post has been edited by Banzai_san: Apr 22 2010, 11:51 AM |
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signither
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Apr 22 2010, 11:49 AM
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QUOTE(MechaHerc @ Apr 22 2010, 11:46 AM) sal 2470 mybe.. wah! damn expensive! QUOTE(Zicron @ Apr 22 2010, 11:47 AM) kata tak nak haul birthday present maa  |
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Wonka
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Apr 22 2010, 11:53 AM
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QUOTE(lwliam @ Apr 22 2010, 11:33 AM) apa tourguide pulak? hahahha, she's a street promoter for Etude House @ Myung Dong. albert, yea was a grab shot.. Mana tau. Looks like tourguide to me. Hahahah. How's Korea compared to Japan? Other than girls la. QUOTE(signither @ Apr 22 2010, 11:45 AM) i wonder what should i get myself for my birthday next month Yeah get 24-70. How I wish my next b'day present is that. |
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signither
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Apr 22 2010, 11:55 AM
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QUOTE(Wonka @ Apr 22 2010, 11:53 AM) Yeah get 24-70. How I wish my next b'day present is that. if get 2470Z, then i won't be celebrating birthday for few years la after this |
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Zicron
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Apr 22 2010, 11:57 AM
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QUOTE(signither @ Apr 22 2010, 11:55 AM) if get 2470Z, then i won't be celebrating birthday for few years la after this hm..i think is good idea, get 2470 can stop hauling, lol  |
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Wonka
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Apr 22 2010, 11:59 AM
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QUOTE(signither @ Apr 22 2010, 11:55 AM) if get 2470Z, then i won't be celebrating birthday for few years la after this If I were to get that, I would stop all spending on my camera equipments. Enough. Hahah! |
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signither
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Apr 22 2010, 11:59 AM
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sure or not?  |
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lwliam
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Apr 22 2010, 12:00 PM
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Your friendly neighborhood photographer
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never went japan before, so cannot compare i want birthday present alsooooo... but anyhoo, my 24-70's serving me pretty good... |
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albnok
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Apr 22 2010, 12:00 PM
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Alpha Male
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kev da man: What is Sony's official response?
Contrast detect AF is the slow, stuttering, hunting AF you see on other brand dSLRs.
If the center point is hit or miss I'd hate to say it would be user error. It might also be backfocus, but often people misdiagnose user error as backfocus.
Do you mean Quick AF LV or MF Check LV? Quick AF LV with a F1.4 lens might show a different focus (I found this too; probably the LV sensor is not focused on the viewfinder properly, as I don't experience this when looking through the optical viewfinder.)
As for either mike or ears, you're using a bright aperture, you can't get them all in focus! Use a darker aperture.
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Zicron
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Apr 22 2010, 12:01 PM
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QUOTE(signither @ Apr 22 2010, 11:59 AM) sure or not? yala, u sure will stop o nt?  |
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kev da man
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Apr 22 2010, 12:01 PM
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QUOTE(Banzai_san @ Apr 22 2010, 11:48 AM) because when the aperture is wide opened, the DOF is very shallow, hence you can really see if it is focusing the right spot correctly (ie sharp). When the aperture opening is smaller, the DOF is much deeper, hence any misfocusing is a little more forgiving... ie can look sharp even if it is slightly out of focused well, i've thought of that, but that does not seem to be the case as well, afterall, when the camera is focusing the lens should be at its widest, correct me if i'm wrong, but why does it still display innaccuracies in focusing? besides, i'm at least 20m away, so even at f2.8 and zoomed in at 200mm, the DOF theoretically should be at least 50cm right? -either that- or the a550 i have right now is a lemon from the start. |
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Wonka
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Apr 22 2010, 12:02 PM
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QUOTE(signither @ Apr 22 2010, 11:59 AM) sure or not? Sure man. Maybe. I dont know. Unless I plan to upgrade body afterwards. XD QUOTE(lwliam @ Apr 22 2010, 12:00 PM) never went japan before, so cannot compare i want birthday present alsooooo... but anyhoo, my 24-70's serving me pretty good... Ohhhh. Then it's alright then. |
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