It's only 2.8 at 17mm, so it'll AF using the 2.8 sensor at 17mm. As you go to 70mm (in this lens design), the angle light enters the lens decreases, and changes the maximum aperture.
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New Sony Alpha 700 is here!
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Dennis Phillips
Senior Member
Thanks for the explanation.
This time around I want to get the very best of lenses and to take advantage of the more accurate f/2.8 AF in the A700. Looks like I'll have to find another solution for wide to mid-zoom.
H
Henry Richardson
Guest
It is only f2.8 at the 17mm end and then progressively gets smaller as you go to 70mm. Typically, by about 19mm it will already be f3.5.
If you want f2.8 through the whole range then you might consider the Tamron 17-50mm f2.8. Reviews are quite good for it.
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Henry Richardson
http://www.bakubo.com
Cameralabs has a bunch of tests for the A700, and one for SSS:
http: cameralabs.com/reviews/Sony_Alpha_DSLR_A700/anti_shake.shtml
It's not that thorough (as my test), but they claim 4 stops at 300mm. If this is true, then indeed, SSS in the A700 is truly impressive. I would like to see a more thorough test though.
http: cameralabs.com/reviews/Sony_Alpha_DSLR_A700/anti_shake.shtml
It's not that thorough (as my test), but they claim 4 stops at 300mm. If this is true, then indeed, SSS in the A700 is truly impressive. I would like to see a more thorough test though.
JoePhoto
Veteran Member
You statement would only be true IF you can gain "4" stops with in-lens OS/telephoto.
I don't believe anyone has made that specific a claim for in-lens OS.
So taking the statement at face value .... it could be interpreted that they are "equal" to present OS w/ teles .... but BETTER with w/a.
(Your Mileage may vary)
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Thanks for reading .... JoePhoto
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Dennis Phillips
Senior Member
Dyxum reviewers liked this lens. Thanks for directing me to it.
Do you know if SONY has started development yet on aarif's 10-10000 zoom? (smiles)
R Valentino
Senior Member
The center one is different
Quite
Not the same sensor design
The center sensor for the 40D is unique to the 40D, not even the MKIII has it.
See above
nickleback
Forum Pro
Where in my statement did I mention in-lens stabilization?
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nickleback
Forum Pro
I'm well aware. I thought by you writing "cross/X" that you were describing cross sensors, not the cross with diagonal of the 40D.
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sandy b
Veteran Member
The specific IS mechanism is optimized for each specific lens. I am not arguing for either system, I believe both are valid, and it appears Sony may have improved its process. In truth, I wish everyone offered it in body. It could always be turned off for is lens. At anyrate, I do not believe there is any degradation using the in lens system.
dylanbarnhart
Senior Member
I don't see how the A700 can help Sony winning market shares. It probably will help preventing existing A100 users from leaving the Sony camp. And that's about it. Having used Minolta SLR and A100 previously, I frequently visited the Sony DSLR forum. It was a sad place. Lots of complaints and disappointments.
In order to make people who already own a whole bunch of Canon/Nikon lenses to switch, Sony gotta make killer features that are above and beyond everything else out there. A sensible package of reasonable features at a reasonable price tag won't do.
Even though the A100 had one killer feature - body Image Stabilization - it did not do the job. Sony sales was insignificant compared to Canon and Nikon. Now that Canon's kit lens comes with IS, having IS in the body is no longer a competitive advantage.
There are a couple of unknowns though. We still don't know how the A700 sensor (that incorporates AD conversion) performs, and how the new autofocus system performs. If they are only on-par with competition, then Sony is in trouble.
In order to make people who already own a whole bunch of Canon/Nikon lenses to switch, Sony gotta make killer features that are above and beyond everything else out there. A sensible package of reasonable features at a reasonable price tag won't do.
Even though the A100 had one killer feature - body Image Stabilization - it did not do the job. Sony sales was insignificant compared to Canon and Nikon. Now that Canon's kit lens comes with IS, having IS in the body is no longer a competitive advantage.
There are a couple of unknowns though. We still don't know how the A700 sensor (that incorporates AD conversion) performs, and how the new autofocus system performs. If they are only on-par with competition, then Sony is in trouble.
It seems as if they only took one shot per SSS setting and shutter speed.
In that case their result is very weak statistically.
OTOH, they seem to shoot at a long distance. Your test at 1m probably
suffers from the short distance, making uncorrectable translation shake a
significant blur factor.
You could try to repeat your otherwise excellent test with a subject far away.
Just my two oere
Erik from Sweden
When posting photos for comment, please give basic settings and/or leave EXIF intact.
Hmm but I don't really understand how subject distance would matter. To the actual stabilization system, it does not take into account subject distance (i.e. when using a lens without distance encoding it still works). Also the amount your hands vibrate isn't affected by where your focus is. And although subject blur will happen more if the subject is closer to you (using simple geometry this can be shown), it is true for both stabilized cases and non-stabilized cases; thus you should be able to compare between the two without subject distance being a factor.
Gary Eickmeier
Senior Member
If I were to tell you what you were full of, this post would not get in.
If I were to tell you...
Gary Eickmeier
Well how about trying to explain why you think he's full of it and how Sony is going to be able to woo customers away then. Oh wait, they're not and that's the best you could do.
Mojo151
Senior Member
Your condition of lock in because of a certain lens collection does is not as valid today as it was a few years ago. Ebay resale value of quality lenses is very, very good. So, buy high quality lenses and jump ship with little cost.
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- Rick
JoePhoto
Veteran Member
Excuse me if I "ass-u-me"d you were referring to the usual argument/debate that in-lens OS works better than IS with telephotos.
I interpreted your statement as a referring to some peoples beliefs that IS does indeed work OK with w/a .... but that OS is better for tele.
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Thanks for reading .... JoePhoto
( Do You Ever STOP to THINK --- and FORGET to START Again ??? )
Corkcampbell
Forum Pro
I own the 5/7D cameras and plan on buying each new Sony as it comes out, but that doesn't mean that I cannot see the marketing logic of the other poster. Sony is not going to increase its marketing share, except for a blip now because of the new camera, with the A700...at least not without a bunch of new lenses, flashes, etc. I am happy with it and think that it is a logical upgrade for myself, but I am not the kind of buyer that Sony needs to attract to get above 10% market share.
At this price level, they are going to lose the newbie upgrade-from-a-P&S/bridge buyer, unless they bring out an entry-level replacement for the A100 quickly.
It's doubtful they are going to get many converts from the larger systems, and they will still lose some KM veterans who have developed the need for a more professional system now, not five years from now.
At this price level, they are going to lose the newbie upgrade-from-a-P&S/bridge buyer, unless they bring out an entry-level replacement for the A100 quickly.
It's doubtful they are going to get many converts from the larger systems, and they will still lose some KM veterans who have developed the need for a more professional system now, not five years from now.
Peter Pauthner
Active member
Quote from a Reuters article:
"Sony aims to raise its market share in the digital SLR camera market to 10 percent with the help of the new model from about 7 percent now, said Keiichi Ishizuka, deputy senior general manager at Sony's digital imaging business group.
"Well-established SLR camera makers are formidable rivals," Ishizuka told a news conference.
"What we need to do first is keep expanding our product offerings. Only by doing that steadily can we compete with them in a true sense. Today, we took that one step forward," he said.
Here is the link to the article:
http://in.tech.yahoo.com/070906/137/6kf0u.html
Regards
Peter
"Sony aims to raise its market share in the digital SLR camera market to 10 percent with the help of the new model from about 7 percent now, said Keiichi Ishizuka, deputy senior general manager at Sony's digital imaging business group.
"Well-established SLR camera makers are formidable rivals," Ishizuka told a news conference.
"What we need to do first is keep expanding our product offerings. Only by doing that steadily can we compete with them in a true sense. Today, we took that one step forward," he said.
Here is the link to the article:
http://in.tech.yahoo.com/070906/137/6kf0u.html
Regards
Peter
Although most of your post was the same bull* you see often here in the DPR forums, this statement I actually agree with, based only on the specs of the cameras of course. We have yet to see how well the new Sony sensor does... at least the guys at PopPhoto seemed to like it.
The only camera in this range that I can see making users of C/N switch, is the D300. Of course, you never know with the rest. On the other hand, when the A700 comes to the stores, I can see everyone who still uses a 7D/5D as their main camera upgrading.
Personally I have two systems, Canon and KM. I am waiting until we see reviews of the cameras until I make the choice between the 40D and the A700.
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