nlvhal Loc: North Las Vegas,NV.

I own a canon t2i camera,the other day I was taking pictures
with the camera and my Tamron 28-300 lens (full name is Aspherical XR Di LD (IF)28-300).I am using the Automatic mode on the camera (green box).My problem is I am not getting the sharpest pictures that I get with my 18-55 lens.Yes,I know that
the smaller lens will get me a sharper picture.Are there any suggestions that I can change the focusing,etc. to get a more accurate focus ? I was shooting horses at a 25-30 foot distance
and there was not that much movement.
Suggestions would be greatly appreciated.

russelray Loc: La Mesa CA

I have the same lens and the same problem. In fact, I'm not happy with any of my Tamron lenses and have removed the company from my lens maker list in favor of Sigma and Canon.

Dria Loc: Ohio

Canon does have a spot in the menu to adjust the sharpness--i doubt in works with the green box. it is available in the creative modes.

RaydancePhoto

Try setting the apature to f8 and f11 and see if that will get you sharper pics.

Almost all lens manufactures make really good lenses, good lenses, and poor lenses. I have several Tamron's and they are great. do a lot of research before deciding on a lens.

cascadeheadjack Loc: Cascade Head, Oregon

I have a T2i and always use the P setting with it set at ISO 800. Also try using spot metering for the focus and take your pictures in burst mode which will allow you to have a larger choice. If you are not using a tripod you should try one. If this does not work then perhaps it is the lens.

jimmya Loc: Phoenix

I have a couple of ideas that may help. I own a t1i, of course very similar to your t2i.

One. I own one Tamron lens, an 18-200 and I won't buy another. It has focus and aberration issues that don't seem to go away unless certain things happen. The worst aberattion is at full zoom out. The focus issues surface if the light is just slightly low.

Two. Get off of the auto mode. First the multi focal points don't often work like they're supposed to. I've found that they too often grab objects that you didn't intend to be focused. To solve this problem I don't use full auto. I always shoot in the P setting or in any one of the manual settings.

In the P setting for example the camera is in full auto but you can change the focal points. I've set both my Canon dslr cameras to single point - dead center. This forces the camera to focus only where that point is placed during your half press - it works very well.

In lower light situations there's often one bright spot, a person's cheek, their eye, something that will allow you to grab focus. You simply put that single red point over that spot, grab focus and shoot.

Just a couple of ideas that may help. Also, do some experiments... or perhaps you have. After setting your camera to single focal point shoot with the Tamron then the Canon, same subject, same light and see what happens.

Good Luck

Dria Loc: Ohio

I have the Canon 60D and the
Zoom Wide Angle-Telephoto AF 28-300mm f/3.5-6.3 XR Di VC LD Aspherical IF Macro Autofocus Lens for Canon
I don't have any problems with this lens.
It isn't as sharp as my 28-105 f4 L by Canon but it wasn't as expensive either and it has longer distance.

nlvhal Loc: North Las Vegas,NV.

thanks I'll try that.

nlvhal Loc: North Las Vegas,NV.

Thank you I'll try your suggestions.

nlvhal Loc: North Las Vegas,NV.

Thank you.

nlvhal Loc: North Las Vegas,NV.

You are my only response that said they enjoy their Tamron lens,
I do a lot of research before purchasing anything and I know that Tamron is not one of the top quality lenses-but I have to go where my money takes me !
Thank you for your suggestions !

russelray Loc: La Mesa CA

You can do like I do and use the various software programs to sharpen those Tamron images. I use, variously, Lightroom 4 Beta, Photoshop CS5, Corel Paintshop Pro X4, Corel Photo-Paint X5, and even Word 2010. Just depends on what I'm doing at the moment. There are also many free programs that have sharpening functions.

Merlin1300 Loc: New England, But Now & Forever SoTX

I have a Tammy 28-75 f/2.8 which I DEARLY love - - but it does NOT have IS. When I was looking for a walk-around for my Canon 7D - - I went with the Canon 18-200 over the Tammy and Sigma competitors, despite the $200 increase in price, due to the better IQ. So, as with all of the available lenses - there are tradeoffs in terms of price and performance. Where you spend your $$$ is up to you. Just gotta do your homework.
.
Your T2i is a GREAT value camera - capable of taking advantage of the best lenses you can put on it. At this point, you will likely benefit most from acquiring higher quality glass. Replace that Kit lens 18-55 with an EF-S 17-55 ($1K) and you WILL notice the difference !!
.
The Tammy 18-300 is a jack of all trades - master of {few}. Unfair to compare a 15x zoom lens (Tammy) with a 3x zoom lens (your 18-55)

nlvhal Loc: North Las Vegas,NV.

Thanks for the tips.

nlvhal Loc: North Las Vegas,NV.

Merlin, I'm quite sure that a Canon lens will out perform a Tamron.Also, I always do my homework whenever I purchase anything !!
Yes,there are tradeoffs and I was trying to get the best price for my pocket book.
What's your take on purchasing a used Canon lens ?