Sony a900 & ZA 16-35mm F2.8

[mysilentkaopei]

standard kit is DT, u should see the marking at the front element of your lens.

 

[jasbay]

standard kit is DT, u should see the marking at the front element of your lens.

Thks. I also hv a kit 75-300 which I cant find DT mark anywhere. Does it mean it can be used on FF w/o vignetting?

 

[yokechye]

Thks. I also hv a kit 75-300 which I cant find DT mark anywhere. Does it mean it can be used on FF w/o vignetting?

minolta/sony 75-300 the kit u got is a full frame lens....

go to http://www.dyxum.com/lenses/index.asp to take a look at the lenses specifications. the coverage should say either APS-C and Full Frame, which i guess u should know what it means
and on the lens specifications

and for APS-C lens, it should have these words on it. different brands have different codes
Minolta/Sony - DT
Tamron - i not sure
Sigma - DC

 

[astrise]

All old Minolta, KM lenses made before the Dynax 7D and 5D were full frame lenses - meaning they covered the 35mm negative size. 35mm negative film size is referred to as full frame - ie. full 35mm frame... so the size of a FF sensor is the same as that of a 35mm colour negative. So any lenses that would work perfectly on a 35mm film camera would also work properly on a FF sensor DSLR.

But as full frame sensors were very expensive a decade ago, manufacturers decided to shrink the sensor size for 35mm DSLR. The 35mm still applied cos of carry over from the film era. The new size was called APS-C (full frame is APS-H). This is quite a bit smaller than a FF sensor. So lenses were made to cover only the APS-C sensor, we refer to these are digital lenses sometimes... for SONY it's the DT range, for Nikon it's the DX range, etc... so the kit lens SONY/KM 18-70mm DT is a APS-C lens. It will cover completely only a APS-C sensor. Because the mount for the two types of lenses are identical (the Alpha mount), you can mount an APS-C lens onto a FF camera. Since the coverage is smaller than the FF sensor, you will get an image like the picture in the post above mine... tunnel vision...

You could also mount the FF lenses (e.g KM 17-35mm) onto an APS-C camera (like A700) and these will still work. Of course, the sensor will only use up a portion of a coverage of the lens. The result is there is an apparent magnification, which is simply a cropping of the perspective...

There I hope it helps...

I believe APS-H is slightly smaller than 35mm (1.3x crop factor) - used on Canon 1D series

 

[Galdor]

I think there are only a handful of DT lenses currently for A-Mount.

Sony/KM:

18-70mm
55-200mm
18-200mm
18-250mm
11-18mm
16-80mm
16-105mm

3rd party (Tamron, Sigma, Tokina, etc)

17-50mm
18-50mm
17-70mm
18-250mm
10-20mm
11-18mm

 

[TME]

I believe APS-H is slightly smaller than 35mm (1.3x crop factor) - used on Canon 1D series

Yupe, that's right... my mistake... thanks!

 

[jasbay]

I think there are only a handful of DT lenses currently for A-Mount.

Sony/KM:

18-70mm
55-200mm
18-200mm
18-250mm
11-18mm
16-80mm
16-105mm

3rd party (Tamron, Sigma, Tokina, etc)

17-50mm
18-50mm
17-70mm
18-250mm
10-20mm
11-18mm

seeing how technology progresses, wldn these DT lenses be worthless when all DSLRs are FF?

 

[jasbay]

minolta/sony 75-300 the kit u got is a full frame lens....

go to http://www.dyxum.com/lenses/index.asp to take a look at the lenses specifications. the coverage should say either APS-C and Full Frame, which i guess u should know what it means
and on the lens specifications

and for APS-C lens, it should have these words on it. different brands have different codes
Minolta/Sony - DT
Tamron - i not sure
Sigma - DC

mine's this.

http://focuscamera.com/product.asp?id=964605037

DT is clearly written on the site but not written on the lens... which means this lens of mine would hv vignetting on the a900?

 

[Galdor]

seeing how technology progresses, wldn these DT lenses be worthless when all DSLRs are FF?

Nope. There will still be people who like to use APS-C sensor cams and the 16mm or 11mm would be useful.

 

[Galdor]

mine's this.

http://focuscamera.com/product.asp?id=964605037

DT is clearly written on the site but not written on the lens... which means this lens of mine would hv vignetting on the a900?

The Sony/Minolta 75-300mm is not a DT lens. This lens is already around in the film days.

 

[nsalman]

jasbay, but the one you post is the sal one which the site clearly states dt. I understand where the confusion comes from. the 75-300 comes in many forms. some produced way back in the 70s while like the one you showed is very new.
take a look at this
http://www.sony.com.sg/product/sal75300
I think this is the same lens as yours but it does not state dt. Since it is from sony.sg official site, guess its not a dt lens.

 

[agws1970]

jasbay, but the one you post is the sal one which the site clearly states dt. I understand where the confusion comes from. the 75-300 comes in many forms. some produced way back in the 70s while like the one you showed is very new.
take a look at this
http://www.sony.com.sg/product/sal75300
I think this is the same lens as yours but it does not state dt. Since it is from sony.sg official site, guess its not a dt lens.

I guess we should all rely on Sony's website rather than a dealer's website for the specs. Official sites know better I guess.

 

[yokechye]

The Sony/Minolta 75-300mm is not a DT lens. This lens is already around in the film days.

so weird the link he sent state DT... Focus must sack their staffs... :bsmilie:

http://www.dyxum.com is the place u can find all the lens minolta and sony produced...

 

[Shin Howard]

Wat abt the std kit 1870? or the SAL 50 1.4? is the wordings "DT" written somehwere? So that I avoid buying DT stuff since may commit to a A900 in future? :embrass:

You can go to US Sony website to see:
http://www.sonystyle.com/webapp/wcs/stores/servlet/CategoryDisplay?catalogId=10551&storeId=10151&langId=-1&categoryId=32334
http://www.sonystyle.com/webapp/wcs/stores/servlet/CategoryDisplay?catalogId=10551&storeId=10151&langId=-1&categoryId=32335

Kit Lens are usually DT Lens meant for APS-C Sensors. Prime Lens like SAL 50 1.4 are usable for Full Frame & APS-C Sensor DSLR.

For more info refer to http://www.mhohner.de/sony-minolta/faq.php#DT_lens

 

[sulhan]

mine's this.

http://focuscamera.com/product.asp?id=964605037

DT is clearly written on the site but not written on the lens... which means this lens of mine would hv vignetting on the a900?

Hi There,

Its the internet age. Remember. Dont just take and believe whatever you see. If there are means, do check the real stuff.
I have seen even sites showing DT for a full frame lens. Can't help it...the webmaster and the sales site may not even realize the error. Thats the real world. Best you could do is ask around like in Clubsnap...probably get 99.99% right answers.

75-300mm is not a DT lens. it supports full frame 35mm bodies.

rgds,
Sulhan

 

[yokechye]

You can go to US Sony website to see:
http://www.sonystyle.com/webapp/wcs...0551&storeId=10151&langId=-1&categoryId=32334
http://www.sonystyle.com/webapp/wcs...0551&storeId=10151&langId=-1&categoryId=32335

Kit Lens are usually DT Lens meant for APS-C Sensors. Prime Lens like SAL 50 1.4 are usable for Full Frame & APS-C Sensor DSLR.

For more info refer to http://www.mhohner.de/sony-minolta/faq.php#DT_lens

i think kit lens no longer mean DT lens always for nowadays

 

[Shin Howard]

i think kit lens no longer mean DT lens always for nowadays

Actually I didn't say kit lens mean DT lens. I said they are usually DT Lens. As so far only SAL-75300 - f/4.5-5.6 which comes with the A200 kit 2 is not a DT Lens.

Maybe when the A900 comes out then bundle it with a 24105G Lens which is not a DT.

 

[jasbay]

jasbay, but the one you post is the sal one which the site clearly states dt. I understand where the confusion comes from. the 75-300 comes in many forms. some produced way back in the 70s while like the one you showed is very new.
take a look at this
http://www.sony.com.sg/product/sal75300
I think this is the same lens as yours but it does not state dt. Since it is from sony.sg official site, guess its not a dt lens.

mine for sure is this $399 lens, the price just confirmed it!

 

[yokechye]

get ready!!

 

[Sierra]

Yeap! 5 more days!!