Tamron developing 150-600mm VC USD lens

gjl711 wrote in post #16575875
The 5D only works to f/5.6 however, I'm sure this lens will report f/5.6 to the body s all the other f/6.3 lenses do so yes, it will focus.

sure it does do AF , and body will show correct EXIF as 6.3 ( not sure how they fake the body to made body think the max aperture may be a 5.6 )

using with 600D no problem and i even can put a kenko 1.4 on it. although this time it cannot report correct exif (still F6.3 at tele) , but af are working.

tamron 150 600 with kenko TC are not working on 5D3 , reported as error 01. i've told tamron this issue and hope they can fix it ......

i am sure that this lens will perform better on aps cmos like 7D because more pixel count in same area and less vignetting (cropped)
also 1.6x we can have more reach (exposure metering and AF are challenged if the target is too small in viewfinder [as also on the metering and AF system] , sometimes APSC body does have advantages lol )

Any posts/reviews on focus breathing with this lens yet? i.e. what the practical focal length becomes at 600mm MFD.

dufflover wrote in post #16576266
Any posts/reviews on focus breathing with this lens yet? i.e. what the practical focal length becomes at 600mm MFD.

not yet but i dont see really big focus breathing while focus from close to infinity at tamron 150 600. where my canon 70 200 2.8II and 55 250 does very heavy focus breathing issue , the frame change a lot after focus too. tamron claim it was 600mm while infinity (not sure for safety or brand always say like this)

plus after zooming from 150 towards 600 i dont need to refocus a lot while some lens does need to refocus a lot (maybe focus group placement not scale to zooming ?)

hksfrank wrote in post #16576341
not yet but i dont see really big focus breathing while focus from close to infinity at tamron 150 600. where my canon 70 200 2.8II and 55 250 does very heavy focus breathing issue , the frame change a lot after focus too. tamron claim it was 600mm while infinity (not sure for safety or brand always say like this)

plus after zooming from 150 towards 600 i dont need to refocus a lot while some lens does need to refocus a lot (maybe focus group placement not scale to zooming ?)

Thanks a lot for joining and for sharing all of your hands on information, hksfrank.

hksfrank wrote in post #16576341
not yet but i dont see really big focus breathing while focus from close to infinity at tamron 150 600. where my canon 70 200 2.8II and 55 250 does very heavy focus breathing issue , the frame change a lot after focus too. tamron claim it was 600mm while infinity (not sure for safety or brand always say like this)

plus after zooming from 150 towards 600 i dont need to refocus a lot while some lens does need to refocus a lot (maybe focus group placement not scale to zooming ?)

Hksfrank, Did you buy the lens or would you? How impressed were you really with the image quality? trying to decide if it is worth waiting for versus other options.

Yeah... that's what makes it somewhat difficult to decide :P I would definitely want to use this range for larger animals/possibly landscapes and such. So i wonder if this will be too long sometimes/ I'd have to stay far back and then cannot use it as a sort of macro lens.

The 300 F/4 was a nice lens to rent. Although like I think I said before, 300 wasn't a huge difference from 200mm. So I guess my options are to wait and see how this lens ends up, or get something with at least 400mm.

An older guy at the park yesterday had the Sigma 50-500 I believe, and said he liked it quite a bit. Although I'm not sure how great the AF or Image Quality is.

1Tanker wrote in post #16575373
Agreed; i found this to be major PITA with the 150-500OS. Without holding it all the way out (not easy on a 16" long lens), it would creep back to around 416mm at anything steeper than about 75 degrees.

In the worse case, you can get one of those rubber band things. If it's like the 70-300VC, mine hasn't developed any creep yet and my 24-70 is super solid, doubt it'll creep for a really long time. Would love the lock at all focal lengths though, for all of my zooms.

Af test on 7D
http://www.youtube.com​/watch?v=I6BXbjSywY4
It's struggling on 600mm,probably because 6.3 is not enough for the side AF point.Im sure i will use only center on 550D .Maybe MF first,then AF.

Draco3D wrote in post #16576921
Af test on 7D
http://www.youtube.com​/watch?v=I6BXbjSywY4
It's struggling on 600mm,probably because 6.3 is not enough for the side AF point.Im sure i will use only center on 550D .Maybe MF first,then AF.

Cool! Thanks for that! Seems to be pretty darn good imo. As fast or faster than my 135 F/2 L. Might be hit or miss for BIF, hard to say, but with center point, which i use 99.9% of the time, on my 60D, it should work well!

Kickflipkid687 wrote in post #16576948
...but with center point, which i use 99.9% of the time, on my 60D, it should work well!

That's what I'm thinking/hoping too. As I'm also using back button and center point only on my 60D 99% of the time.

- DAA

jaspa wrote in post #16576380
Thanks a lot for joining and for sharing all of your hands on information, hksfrank.

Dear hksfrank,

I just want to repeat what jaspa has said. I also appreciate that you have joined the forum and shared your experience with the Tamron 150-600.

In a dream world I'm sure everyone on this board would have a bag full of "L" lenses and a personal assistant to carry them around. But for many of us the ability to get a bit more reach and decent results from a lens is all that we ask. From your review it appears that Tamron has done a pretty good job of answering the request of the less well funded photographers of the world.

Thanks again for the time and effort you put into your review.

Regards,

Tim Murphy

Draco3D wrote in post #16576921
Af test on 7D
http://www.youtube.com​/watch?v=I6BXbjSywY4
It's struggling on 600mm,probably because 6.3 is not enough for the side AF point.Im sure i will use only center on 550D .Maybe MF first,then AF.

I don't see any serious struggling there. This is pretty normal in my experience. When the DoF is so shallow that the out of focus areas are virtually a uniform blur with hardly any texture, it's not as easy for a camera and lens to quickly and immediately focus on the other target without a small correction. Pretty much all of my tele lenses I've owned in the past behaved similarly (No, I've never owned the $10K white Canon monsters.)
The shorter the focal length the more "texture" can be seen in the out of focus areas, either it's the background bushes or the plant in the foreground. This "texture" or detail makes it easier for a camera + lens to quickly achieve focus without extra corrections.
but this is just my own theory based my experience with 5 different long tele zooms in the past.

Since zooms with 6.3 Ap.at the "long" end have been known to have "sluggish" AF when zoomed out, with APS-C cameras; I wonder if Dual Pixel CMOS AF will improve things, in that regard?

Be interesting to see how AF performs on a 70D vs 7D

Leigh

www.leighwax.com

Well I don't know if the dual pixel will help in non-live view really? I think the 70D and 7 performed very similar in reviews I saw, or if anything, the 7D was faster.

Really though, to get the best performance, I'd always use the center point, probably even on a Mark III or 1DX. Although those 2 might have excellent AF in multi point. I can't trust that on my 60D.

Another focus video with a 5D3 this time
http://www.youtube.com​/watch?v=4xN2Pc3lxlI

There is some raw files here
http://camahoy.com/


Warrick