Sony A33
- Thread starter Jetnge
- Start date
Velectron
Senior Member
No...there is no play in AF mode because the drive motor is engaged. What I meant was that, in manual mode, you can turn the manual focus ring until the image is sharp, and then some more (to beyond infinity and blurness). Some lens cannot focus properly to infinity because the focus had hit the infinity stop before infinity focus is achieved. This is not what is happening on my Minolta lenses, so thats why I suspect the camera is the culprit. Sony 18-55 kit lens mostly can get good focus however. Minolta lenses sometimes focus ok sometimes not, some lenses no problem, some got problem, so dunno what's wrong. I wonder if the reason for this is due to changes to the mount on the camera that also causes Sigma lenses to not work. 
To Rashkae, Teodesson, & Singadude,
Sorry for not responding; just returned from a short break. Thanks for your advices. I tried manual focus on my Tamron 17-50mm f2.8 & pictures are very sharp to my liking. At least I know that the softness is not due to my camera. But the AF of A33 is still not 100% accurate. I had misses (softness), say 30% of the time, & I'm not shooting action; just portrait shots.
Did some shooting last night at GV Gold Class room & the place was very dim. A33 video worked quite well & Tamron 17-50mm f2.8 did a good job. But I realised that becos A33 has no AF assist lamp, it depends on the flash to read exposure, resulting in shutter lag. Now I know another weakness of the A33. Since this is my 1st Sony camera, my confidence in Alpha cameras is little shaken.
frederickykfoo
Senior Member
Does A33 have digital Zoom like the A300 or A350 ?
Does A33 have digital Zoom like the A300 or A350 ?
If you mean digital zoom like for Manual focusing, ...yes ! there are 2 zoom levels. (you have to setup in menu and activitate it with the 'delete' button)
Does A33 have digital Zoom like the A300 or A350 ?
The "Digital zoom" on the A300/350 was not really a composition aid, it was just an auto-crop. It was a near-useless and generally reviled "feature".
On the new sony bodies, a manual focus assist live view is used. It's a different concept but infinitely more useful.
frederickykfoo
Senior Member
No, it is not for Manual focusing but to take pictures like in compact cameras and Nikon D2X where the focal length of your lenses is multiple to a longer telephoto lens. Thanks
No, it is not for Manual focusing but to take pictures like in compact cameras and Nikon D2X where the focal length of your lenses is multiple to a longer telephoto lens. Thanks
Aaah sorry. But what do you mean?
The liveview is also called "manual focus assist" for a reason - it magnifies the image 7x or 14x to allow for fine manual focus control. I'm not sure what you mean by "but to take pictures like in compact cameras and Nikon D2X where the focal length of your lenses is multiple to a longer telephoto lens."
If you are referring to the crop factor, then no, the sony body manual focus assist has nothing to do with that.
Almost all entry-level bodies from all brands (Nikon, canon, etc) use the flash for focus assist. Nothing different there, so it's not a weakness of the A33 - it's just the way entry-level DSLR cameras are designed.
No, it is not for Manual focusing but to take pictures like in compact cameras and Nikon D2X where the focal length of your lenses is multiple to a longer telephoto lens. Thanks
Okay, understand you fully now :bsmilie:
My A500 has this digital tele 1.4x and 2x switch which does as you have described above.
The A33/A55 does not have this but a manual focus assist feature which is much more useful as describe by Bro Rashkae. :thumbsup:
frederickykfoo
Senior Member
Yes, that was what I meant. Too bad A33/A55 does not have that.:cry: Many thanks for the info.
Yes, that was what I meant. Too bad A33/A55 does not have that.:cry: Many thanks for the info.
no offense but the digital teleconverter is rubbish...
albertri
Senior Member
is this similar to those compact cam with digital zoom when stretch out it does affect the image quality?
frederickykfoo
Senior Member
Yes, it is quite bad if the light is low or indoor. But on a Sunny day, it is quite OK. I am not fussy.
Ghostfit said:
Tried many 1.4x or 2x teleconvertor. All are either very soft or as bad as the digital zoom eg. Kenko Pro 300 series. Also one lost total exposure by 1 to 2 stop respectively. Minolta and Sony teleconvertor cannot use on short lenses. So far only Tamron old version seem ok but they do not make or sell anymore. Not sure how good is the new ones.
Many thanks all for the input and info.
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I've got the Tamron 1.4x, IQ is acceptable (Got this from Bro Jnet6 in the MO section), actually quite alot of place selling if you know where to look !
Tried the 2x but didn't like it because of the lost of 2 stops (No AF) and handshakes means the combi is only usable in very bright sunny light.
albertri
Senior Member
I've got the Tamron 1.4x, IQ is acceptable (Got this from Bro Jnet6 in the MO section), actually quite alot of place selling if you know where to look !
Tried the 2x but didn't like it because of the lost of 2 stops (No AF) and handshakes means the combi is only usable in very bright sunny light.
haven't tried such yet bro if happen we go to the same outing can bring your tamron 1.4x me want to try =)
tks
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