my tamron 17-50mm not sharp ! help !

[vnwt88]

i also have difficulty with this lens with my d90;

i usually shoot in P ( auto ) mode and some of the very easy shots also do not turn out sharp or in focus or shallow DOF prob;

should i not shoot in P mode but in A ( aperture ) mode and set aperture to f4?

when can i use f2.8 n get a not soft image?

thanks in advance...

 

[darrrrrrrrrr]

i also have difficulty with this lens with my d90;

i usually shoot in P ( auto ) mode and some of the very easy shots also do not turn out sharp or in focus or shallow DOF prob;

should i not shoot in P mode but in A ( aperture ) mode and set aperture to f4?

when can i use f2.8 n get a not soft image?

thanks in advance...

take yr camera off P mode and use Av so you have control over your aperture and hence DOF.

select the centre AF point rather than leaving the choice to the camera. focus using the centre point and then recompose the framing.

either than or choose the AF point that is on the part of the frame that you want to focus on and use that.

this picture was shot at Av mode f2.8 using centre AF point focus-recompose. the purple flower nearest the front is sharp while the rest are out of focus.

this was shot at f4 as the flower was bigger and required a bit more DOF to get most of it in focus.

hope this helps.

btw pls try to post the problematic photos as it will help others to help you. currently nobody knows what the problem is, whether its a mis-focused shot, wrong choice of aperture, bad lens sample, etc

 

[MrJelly]

taken by tamron



confirm ! my tammy has a bit front-focusing problem. In above photo, I focus on the word "Reverse gear", but most shots came out with the focus on the words below (as u can see in photo). I holding by hand and shooting (as my lousy tripod cant hold 45 degree down position ). But to make sure, I have taken like 20 shots; 3 shots each time from same position without moving my hand at all. Only a few shots got correct focus.

Just tested with my newly-just-bought 50mm 1.8d lens, I can focus on the word. About 3 shots taken (moved position a bit also). But from any position, all were focused on what I wanted to.
Nikon...ur the best !!

taken by 50mm



what should I do?? any bro can help me out to confirm this problem on any weekend?

Anyway, I dont mind sending to Japan also even if it take 1 month or 2 as warranty is 3 years. But I'm afraid if i send wrongly based on my judgement, then..later they may say..."No problem, why send for calibration?" And the worst, 2 months to enjoy will be gone !

Somebody plz rescue my tammy !

 

[MrJelly]

these are a few correct focus shots by tamron. Is it due to at correct angle?
(plz ignore my hand black shade)

 

[edarkflame]

go back to MS and ask for another copy

 

[darrrrrrrrrr]

i dunno, i also heard that the actual AF sensor may not directly line up with the red light in your viewfinder. maaaybe that's a factor?:think:

if it is then this paper test may not be indicative of FF/BF on your lens.

 

[MrJelly]

go back to MS and ask for another copy

U think they will exchange for me?? :embrass:

 

[MrJelly]

i dunno, i also heard that the actual AF sensor may not directly line up with the red light in your viewfinder. maaaybe that's a factor?:think:

bro...cannot be AF sensor problem. As i use same body on two different lens. Photos are taken by same setting and in the same way of focusing.

Just 3 shots by 50mm 1.8....all 3 got correct focus.
Only about 3 out of 20 shots by tamron got correct focus.

I should hav known this is not sharp copy since in the shop cuz the box looks not new and even got scratches and dirt below. This must be the one someone exchanged back and got sold to UNLUCKY me. :cry: :angry:

not fair...my bad luck...

 

[MrJelly]

ok more confirm...hav front-focus problem in my tamron. Very obvious. see below (Photos are cropped to see more clearly). Later, I gonna go try exchange this tamron in MS today as it's 3 days old only. They should be responsible for it.

taken by tamron (cropped)





taken by nikor 50mm 1.8d (cropped)

 

[tomcat]

It's a bit unfair to compare a zoom lens with the Nikon 50mm f/1.8. The Nikon may be cheap but it is a prime lens and a very sharp one at that.
Also your image of the shot taken with the Tamron looked so pixellated compared to that of the Nikon's, it's like it has been over enlarged giving the impression that it is not sharp. :think:

 

[catchlights]

It's a bit unfair to compare a zoom lens with the Nikon 50mm f/1.8. The Nikon may be cheap but it is a prime lens and a very sharp one at that.
Also your image of the shot taken with the Tamron looked so pixellated compared to that of the Nikon's, it's like it has been over enlarged giving the impression that it is not sharp. :think:

correct, even want to do a side by side comparison, at least also use another same lens to make comparison test, anyway, advice already given, but won't bother to do a proper focusing test, how else can you help him?

 

[darrrrrrrrrr]

i compared my tamron to a 50mm prime before. of course the prime is going to be sharper stopped down than the zoom wide open. anyway your tamron photo is so pixellated, are you sure you did the crop and resize correctly?

if the problem doesn't surface in real-world shooting, it might be better to just keep it than exchange it/send for recalibration. what if you get a worse copy instead?

 

[MrJelly]

correct, even want to do a side by side comparison, at least also use another same lens to make comparison test, anyway, advice already given, but won't bother to do a proper focusing test, how else can you help him?

bro, I hav done test shot on words on paper. Plz dont misunderstand me. I know u all are helping me. If hav time, I will try to do test on proper focusing chart. But look at all photos, obvious focus not right.

i compared my tamron to a 50mm prime before. of course the prime is going to be sharper stopped down than the zoom wide open. anyway your tamron photo is so pixellated, are you sure you did the crop and resize correctly?


if the problem doesn't surface in real-world shooting, it might be better to just keep it than exchange it/send for recalibration. what if you get a worse copy instead?

I also really shock to see most shots taken by tamron look pixellated on zooming. But i really didnt do except cropping as same as cropping on photo by 50mm 1.8. Both above 2 photos are zoomed in and cropped only. No pixellating. No bias. If dont believe, I can upload and show original photos.

 

[soeypixels]

just get a measuring tape will do the job

 

[MrJelly]

more comparison. just taken. both taken at 50mm focal length at f2.8. 200 iso. 1/60 shutter speed.

No pixellation or resizing. Just zoom in and cropped.

by nikon



by tamron

 

[MSZ006Zeta]

Your last batch of photos are blur. Both of them.

I doubt there's a focusing problem. Your first few pictures look pretty sharp to me.

 

[catchlights]

just see how the test being conducted? who can say the result is conclusive?

anyway, so many people already given suggestions.. if you bother to read carefully, you already have the solution.

 

[MrJelly]

just get a measuring tape will do the job

I dont have a tripod to hold body at same exact angle, place and shoot.
All these precise focusing on tape or test chart require body and angle to be at exact position.
Am i rite?
:embrass:

 

[serametin]

i think this link is helpful?

http://focustestchart.com/focus21.pdf

use the test chart on page 18 if u don't want to read too much things.

 

[soeypixels]

I dont have a tripod to hold body at same exact angle, place and shoot.
All these precise focusing on tape or test chart require body and angle to be at exact position.
Am i rite?
:embrass:

u didnt read catchlight reply very first reply in this thread?