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Photography The Sony Alpha Thread V54!, The Orange Legion

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EvanKeat
post Oct 17 2011, 10:16 PM

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welcome! percyteyu!

watch out for new a77 promotion! I working on the graphics! tongue.gif

fansoption
post Oct 17 2011, 10:31 PM

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Raindrop.
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lwliam
post Oct 17 2011, 10:38 PM

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e-jump! Magnificent!

Whose kitty is it? It's so fluffy I'm gonna daiii
Newbieeeeee
post Oct 17 2011, 10:39 PM

:)
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QUOTE(albnok @ Oct 17 2011, 05:42 PM)
Newbieeeeee: Contrast Detect AF is pretty much like how you'd manual focus a lens from looking at the screen alone - keep turning it until it gets contrasty.

Phase Detect AF uses a pair of AF sensors, one looking from the left, the other from the right. It sees how far the same image is from each other in the left and right sensor, and knows exactly where to focus based on this.

If you've seen a split-prism viewfinder you'll know exactly what I mean.

deadangel: Well you'd need to get a faster card, unfortunately - you have a few options:

1) Sony Memory Stick Pro Duo HG (read 50MB/s, minimum write 15MB/s, maximum write 20MB/s)
2) Sandisk Extreme Pro UHS-1 (read 45MB/s, write 45MB/s)
3) Sandisk Extreme Pro UHS-1 (read 95MB/s, write 90MB/s)
4) Toshiba UHS-1 (read 95MB/s, write 80MB/s)
5) Delkin Elite633 UHS-1 (read 95MB/s, write 45MB/s)

Note that the read speed is written on the package - this is the only way to tell between say the Sony MSPD 50MB/s and the older MSPD 30MB/s.

Eh, after a burst, it should only hang for 20 seconds or so on a MSPD 30MB/s card.
*
oh. Googled it but didn't understand, so ask here. So which is better?
EvanKeat
post Oct 17 2011, 10:53 PM

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newbieeeee, too put it simply, phase detection - fastest focusing in live view than contrast detection.
Zicron
post Oct 17 2011, 11:27 PM

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QUOTE(e-jump @ Oct 17 2011, 10:15 PM)
» Click to show Spoiler - click again to hide... «

a850 + 85ZA @ F1.4
*
The DOF is very very thin drool.gif
Newbieeeeee
post Oct 17 2011, 11:27 PM

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QUOTE(EvanKeat @ Oct 17 2011, 10:53 PM)
newbieeeee, too put it simply, phase detection - fastest focusing in live view than contrast detection.
*
Live view? I seldom use one wor. OVF leh?
Zicron
post Oct 17 2011, 11:50 PM

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QUOTE(Newbieeeeee @ Oct 17 2011, 11:27 PM)
Live view? I seldom use one wor. OVF leh?
*
QUOTE(albnok @ Oct 16 2011, 05:59 PM)

jimlim007: All AF SLRs are using phase-detect AF when using the optical viewfinder. Only Sony uses phase-detect AF in Live View (except the A450 and NEX cameras without using the LA-EA2). The rest use contrast-detect AF in Live View to provide an uninterrupted view. Contrast-detect AF is slower.
*
newbiee, this
ieR
post Oct 17 2011, 11:57 PM

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newbie:
phase detect = godlike that why DSLR core is phasedetect.
contrast detect = d**klike... so all compactcamera for ***ks tongue.gif so is DSLR equip with contrast detect LV...


(oh no i going to spark fire)
Newbieeeeee
post Oct 18 2011, 12:05 AM

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QUOTE(Zicron @ Oct 17 2011, 11:50 PM)
newbiee, this
*
Oh. I see. Thanks! biggrin.gif
ChrisHock
post Oct 18 2011, 12:06 AM

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Still no one hav sony SLT a35??

is this model nice?


Newbieeeeee
post Oct 18 2011, 12:06 AM

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QUOTE(ieR @ Oct 17 2011, 11:57 PM)
newbie:
phase detect = godlike that why DSLR core is phasedetect.
contrast detect = d**klike... so all compactcamera for ***ks tongue.gif so is DSLR equip with contrast detect LV...
(oh no i going to spark fire)
*
Eh, but a580 if I mount on a SAM or SSM lens, it'll change to contrast AF. That's the default..
ChrisHock
post Oct 18 2011, 12:18 AM

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new here, can anyone tell me wat's the diff of 35mmF1.8 & 50mmF1.8?? is this two lens are fix focus and cannot zoom??

i'm vry interested in A35.. is tat two lens suit for it? which one is better??

lwliam
post Oct 18 2011, 12:24 AM

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QUOTE(Newbieeeeee @ Oct 18 2011, 12:06 AM)
Eh, but a580 if I mount on a SAM or SSM lens, it'll change to contrast AF. That's the default..
*
Where did you get that information from?


Added on October 18, 2011, 12:30 am
QUOTE(ChrisHock @ Oct 18 2011, 12:18 AM)
new here, can anyone tell me wat's the diff of 35mmF1.8 & 50mmF1.8?? is this two lens are fix focus and cannot zoom??

i'm vry interested in A35.. is tat two lens suit for it? which one is better??
*
Yes, both of those lenses are fixed focal length lenses (also known as 'prime lenses'), one at 35mm and one at 50mm equivalent field of view. So, you can't zoom with them, you can 'zoom' with your legs though. Difference between the two lenses is in focal length.

There's no such thing as which lens is better suited for which body (apart from the Nikon D3/5xxx case where you can't AF with lenses without in-built motor). It depends more on what purpose you want the lens to work as. Do you need a wider or a narrower view? Go to the stores to test it out. Borrow the camera from a friend who has it and test it out if possible.

If you are really unsure of which to get and worry that you might get the wrong one, then just stick with the kitlens that comes with the camera for the mean time while you improve on your camera knowledge before investing in a prime lens.

This post has been edited by lwliam: Oct 18 2011, 12:30 AM
ieR
post Oct 18 2011, 01:58 AM

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QUOTE(Newbieeeeee @ Oct 18 2011, 12:06 AM)
Eh, but a580 if I mount on a SAM or SSM lens, it'll change to contrast AF. That's the default..
*
that if you use the MF liveview check thingie. normal QLV using phase detect.
TSalbnok
post Oct 18 2011, 02:22 AM

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I've updated the front page regarding the A77 and wireless flash.

8tvt: Yes it is written on the package.

There is also a Sandisk Class 10 30MB/s but you don't want that for the A77. wink.gif

e-jump: Nice! Love how the reflection is blurred out.

fansoption: Nice! It almost looks like a texture.

Newbieeeeee:

PDAF = faster because it knows exactly where to go once it has looked once
CDAF = slower because it keeps adjusting and checking

By nature the PDAF sensors are getting light that passes through the main mirror, reflects off the secondary mirror, into the AF chamber. The distance from the lens to the PDAF sensors should be the same as the distance of the lens to the sensor.

If not, you get a backfocusing/frontfocusing camera!

PDAF on sensor (which the Nikon V1/J1 supposedly has, but where are the tech documents?) solves this. Since there are no TWO distances, there is no misfocus from calibration error.

CDAF, because everything happens on the main sensor, does not have backfocusing/frontfocusing issues.

The A560/A580 uses PDAF in Quick AF Live View, and allows you to choose between PDAF and CDAF in Focus Check Live View.

This post has been edited by albnok: Oct 18 2011, 03:37 AM
TSalbnok
post Oct 18 2011, 04:25 AM

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user posted image
Shot with the A900...

user posted image
...and the Carl Zeiss Distagon T* 24mm F2.0 ZA SSM...

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...to make for shallow depth of field at wide-angle macro distances.
ChrisHock
post Oct 18 2011, 07:12 AM

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QUOTE(lwliam @ Oct 18 2011, 12:24 AM)

Yes, both of those lenses are fixed focal length lenses (also known as 'prime lenses'), one at 35mm and one at 50mm equivalent field of view. So, you can't zoom with them, you can 'zoom' with your legs though. Difference between the two lenses is in focal length.

There's no such thing as which lens is better suited for which body (apart from the Nikon D3/5xxx case where you can't AF with lenses without in-built motor). It depends more on what purpose you want the lens to work as. Do you need a wider or a narrower view? Go to the stores to test it out. Borrow the camera from a friend who has it and test it out if possible.

If you are really unsure of which to get and worry that you might get the wrong one, then just stick with the kitlens that comes with the camera for the mean time while you improve on your camera knowledge before investing in a prime lens.
*
ok.. thanks.. if jz stick to kitlens should i go for twins lens? 18-55 & 55-200??

e-jump
post Oct 18 2011, 08:11 AM

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QUOTE(lwliam @ Oct 17 2011, 10:38 PM)
e-jump! Magnificent!
Whose kitty is it? It's so fluffy I'm gonna daiii
*
thanks. its a stray cat. we decided to keep him


QUOTE(Zicron @ Oct 17 2011, 11:27 PM)
The DOF is very very thin  drool.gif
*
yep.. its either hit it, or miss it.
but i think 135z lagi best, 60% longer focal w/ 1/3 stop slower brows.gif


QUOTE(albnok @ Oct 18 2011, 02:22 AM)
e-jump: Nice! Love how the reflection is blurred out.
*
thanks. power of fast lens tongue.gif

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noise at iso 1600 ;__;

anyway, im thinking to try sceneries n currently thinking my 28mm isnt wide enough esp when i shoot in 16:9.
aside then going full manual on samyang 14mm(distortions YO), what other option that i can look into, other than not so good market price of 1735 minolta(1.5k??!!)? im ok with slow lens as i'll be shooting F8 anyway (fast lens would be bonus)
*1635Z is out of my league.

This post has been edited by e-jump: Oct 18 2011, 08:13 AM
lwliam
post Oct 18 2011, 08:12 AM

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Congratulations Albnok!


Added on October 18, 2011, 8:15 ame-jump, from what I see, there isn't much choice for a wide lens. But I vouch for the KM 17-35 f/2.8-4. Works good for me.

This post has been edited by lwliam: Oct 18 2011, 08:15 AM

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