General lens and exposure questions.

Thinking about buying a Tamron 28-75mm for my walkaround lens, any thoughts?

On the Rebel XS, what exactly is the A-Dep setting used for?

Thanks.

If it is like my T1i manual A-Dep activates autofocus points and then picks the best aperture to have the right depth of field to have everything in your image in focus.

Did you read the description of this mode in your manual?

Basically, the camera looks at the scene, and attempts to work out what aperture would get all of the objects in frame in focus, and then select that and an appropriate shutter speed.

So if you had a person up close, and a second person in the frame ten feet back, the camera would choose a narrow aperture to give enough depth of field to get both people in focus (if possible).

I find the mode next to useless and have never used it for anything proper. I strongly suggest getting used to Av and M modes, and occasionally Tv mode, before any others...

talbot_sunbeam wrote in post #13911318
Did you read the description of this mode in your manual?

Basically, the camera looks at the scene, and attempts to work out what aperture would get all of the objects in frame in focus, and then select that and an appropriate shutter speed.

So if you had a person up close, and a second person in the frame ten feet back, the camera would choose a narrow aperture to give enough depth of field to get both people in focus (if possible).

I find the mode next to useless and have never used it for anything proper. I strongly suggest getting used to Av and M modes, and occasionally Tv mode, before any others...

Thank you for that. Yes, I have read the manual, however, I don't always understand what is being explained.

Any input on the 28-75 lens? I am using a Tamron 18-250 right now as my everyday lens. Thank you in advance.

tawcat wrote in post #13912471
Thank you for that. Yes, I have read the manual, however, I don't always understand what is being explained.

Any input on the 28-75 lens? I am using a Tamron 18-250 right now as my everyday lens. Thank you in advance.

Here are some reviews:
http://www.the-digital-picture.com ….8-XR-Di-Lens-Review.aspx
http://www.photozone.d​e/Reviews/418-tamron_2875_28_5d
http://www.bobatkins.c​om …reviews/tamron_​28_75.html

tawcat wrote in post #13912471
Thank you for that. Yes, I have read the manual, however, I don't always understand what is being explained.

Any input on the 28-75 lens? I am using a Tamron 18-250 right now as my everyday lens. Thank you in advance.

What do you shoot most? If that is the most commonly used range of focal lengths, then it would be a good investment. However, if you find you're mostly shooting telephoto, you might be happier with something that is a 70-200. If you find that you're mostly shooting 18-40, you might be happier with something as wide or wider. It isn't really whether or not it is a "good" lens, it's whether or not it is a lens that you will use enough to make the investment you put into it worth it.

[QUOTE=tawcat;13912471​]Thank you for that. Yes, I have read the manual, however, I don't always understand what is being explained./quote]

You've got that right! Everyone always says read the thing but even after reading it several times I'm often still none the wiser.

The Tammie 28-75 has been my most used lens for the last seven years and three cameras, but if the recently announced Tamron 24-70 VC is as good as the 28-75, it will probably be replaced in about six months.

Thanks to all that have provided input. I always come away from this forum with a sense of learning. Manuals are great, but they never will replace the word of experience.

My Tamron 28-75 is my workhorse lens. I love it. I got a very sharp copy and its an excellent portrait lens.

BrickR wrote in post #13916036
My Tamron 28-75 is my workhorse lens. I love it. I got a very sharp copy and its an excellent portrait lens.

Thanks. Can you tell me what body you have this on? And what is the exact description of the lens? It appears Tamron offers two different lenses in 28-75. Thanks you again.

My walk-around is a Sigma 24-60mm f/2.8 EX lens that I find to be PERFECT for everyday shooting. I think a constant aperture mid-range zoom is great photographic tool and a good default.

18-250mm lenses sound good on the surface - but what you give up for that range is too great from my perspective. If someone wants a one size fits all lens - why get a DSLR anyway?

another lover of the 28-75 here, although you will need to complement it with a wide angle lens, especially on a crop body.

mike_311 wrote in post #13916426
another lover of the 28-75 here, although you will need to complement it with a wide angle lens, especially on a crop body.

Thank you, what is the exact description of the lens? It appears Tamron offers two different lenses in 28-75. Thank you again.

Tamron SP AF Aspherical XR Di LD (IF) 28 - 75 mm 1:2.8 Macro.

I think they may have gotten drunk on their alphabet soup.

BTW, mine got knocked off a table and fell to the floor last week. Not a mark on it but I immediately did a focus test thinking that the alignment of an element might have changed, but the result I got was the same microadjustment as before, +6.