Tamron 28-75 and cropped sensor

[Tea and Two]

Hi! Im new here!

So Im looking for a new lens and am between the Tamron17-55mm 2.8 and the Tamron 28-75 2.8. Here is my question- I've got a D7000, thats a cropped sensor, so I know the 17-55 was made specifically for cropped sensors and that the 28-75 is a full frame lens, does that mean that it the 28-75 would be a different focal length if I put it on my d7000? Ive heard some numbers 43-103 mm or something like that? Or would it remain a 28-75??Is this making sense?

TIA!

[Tom]

The lens remains a 28-75mm. But what you will see on your picture will be cropped by 1.5.

It will be the exact same as a normal 28mm lens on a full frame body, only the edges will be cut off. But what you see through the viewfinder will be more or less what you get.

I really liked the 28-75 when I used cropped bodies. It was a great performing lens and I highly recommend it. If you do more indoor stuff, you may prefer the 17-50.

I shot this forever ago when I was first starting out:
The Sudan

This was almost 6 years ago. Exclusively shot with a Canon 10D (Canon is about to release the 70D, if that tells you hold old that camera is!) and the Tamron 28-75mm 2.8.

I preferred a combination of 28-75mm for my normal and either the Sigma 10-20mm for my ultra wide or Tamron 11-18mm (if I had it to do all over) and a 70-200mm for my telephoto.

Hope that all makes sense!

Tom

[Tea and Two]

Thanks! Great shot btw!
So pretty much on my D7000 the 28-70 will be a 43-102mm (or something like that) for all intents and purposes ?

I keep hearing how great the IQ is with this lens on a crop , but I do shoot inside a lot :/
..thing is I kinda got a little excited and already ordered it a few days ago..eekkk hope I like it :)

[Tom]

It will be cropped to be something like that, but your lens will behave like a 28-75. By that I mean that a 100mm lens will have a shallower DOF and will compress the foreground and background. You won't get that benefit.

But if you aren't going back and forth from a cropped sensor to full frame sensor, you probably won't notice the difference.

[shnitz]

Mandy, do you have a lens that came with your D7000, like the 18-105? If so, then you can see how the new lenses will perform. Zoom your current lens to 28mm; that is the widest that it can go. I think once you try living with a walkaround/midrange lens that can't take photos wider than 28mm, you'll see that for 95% of people, it's not going to cut it.

Don't worry about the crop factor; that just relates to older film photographers what kind of lens they're getting in to. For example, an old Nikon film camera with a 50mm lens has about the same angle of view as a D7000 with a 35mm lens; this happens because most sensors are smaller than film was. So, if you're selling a lens to someone with a D7000 and knowledge of film, you can tell them that a 35mm is a normal lens.

[groovyone]

I used a 28-75 on my APS-C A100 for a while, but I tend to shoot wider so I ened up carrying the 28-75 AND an 11-18. The 28mm on the 28-75 full frame lens will look just like the 28mm on a 17-55 APS-C lens on your camera. The important thing is, is 28mm wide enough for you?

For me I wanted the f/2.8 speed so I kept it, but like I said I ended up buy ing an ultrawide to get my wide end back. Later I ended up going to a 16-80 f/3.5-5.6 because for me the focal range was perfect for one lens and I was willing to take the speed hit.

However, my 28-75/2.8 was great once I went full frame.

[Tea and Two]

Originally Posted by shnitz

Mandy, do you have a lens that came with your D7000, like the 18-105? If so, then you can see how the new lenses will perform. Zoom your current lens to 28mm; that is the widest that it can go. I think once you try living with a walkaround/midrange lens that can't take photos wider than 28mm, you'll see that for 95% of people, it's not going to cut it.

Don't worry about the crop factor; that just relates to older film photographers what kind of lens they're getting in to. For example, an old Nikon film camera with a 50mm lens has about the same angle of view as a D7000 with a 35mm lens; this happens because most sensors are smaller than film was. So, if you're selling a lens to someone with a D7000 and knowledge of film, you can tell them that a 35mm is a normal lens.

Thank you for the reply! But Im still a little confused-
I have my kit lens from my old D5000, which I never use and two Nikon lenses a 18-200f/3.5-5.6 and the 35 prime. Both the Nikon lenses are DX so they fit my cropped sensor.
Im still confused if because a full frame 28mm lens will be cropped 1.5 on my D7000 wouldnt that esentaily for me make it a completely differnt focal lenth that Id be looking at though the lens?

[Tea and Two]

Originally Posted by groovyone

I used a 28-75 on my APS-C A100 for a while, but I tend to shoot wider so I ened up carrying the 28-75 AND an 11-18. The 28mm on the 28-75 full frame lens will look just like the 28mm on a 17-55 APS-C lens on your camera. The important thing is, is 28mm wide enough for you?

For me I wanted the f/2.8 speed so I kept it, but like I said I ended up buy ing an ultrawide to get my wide end back. Later I ended up going to a 16-80 f/3.5-5.6 because for me the focal range was perfect for one lens and I was willing to take the speed hit.

However, my 28-75/2.8 was great once I went full frame.

Whats that? I was figuring I could use my 18-200 f/3.5-5.6 if I wanted to go wider, its not perfect but it shoots better on the wide side

[groovyone]

No. The confusion comes in because 28mm on an APS-C will look like 28mm from ANY lens on APS-C, even if it is a DX lens.

The difference is 28mm on a FX sensor (full frame) will NOT look the same.

Regardless of a lens being APS-C or Full Frame, focal length is focal length. Any lens on yours will look the same at a given focal length.

It can be fairly confusing, but unless you are comparing it to a full frame digital or film camera you can just think of DX and FX lenses as being equivallent.

As for your 18-200, that would let you keep the wide end, and it shouldn't bee too slow from 18-28mm.

[brewercm]

Have mine I used on my D90 and now my D7000 and you couldn't pry that thing from my dead hands. Best overall use lens I have even though it may not be as wide as some like. I am looking to get a good wide angle lens but not something that is a priority for me.

[Tea and Two]

Originally Posted by brewercm

Have mine I used on my D90 and now my D7000 and you couldn't pry that thing from my dead hands. Best overall use lens I have even though it may not be as wide as some like. I am looking to get a good wide angle lens but not something that is a priority for me.

LOL! I hope I like it as much!

[Jake]

I use to have the Tamron 28-75 2.8 and I loved it. Used it on my 20d.

That said, this thread confuses me.


Mandy, the more you shoot the more you'll know what focal length you use the most.
If you photograph people a lot, I think the 28-75 is the better choice than the 17-55. And like you said, you have the 18-200 when you need wider anyway.
Don't get too caught up in the cropped sensor mathematical equations of crop = XYZ full frame. It can end up being more of a distraction in the learning process IMHO.

[rockpics]

Originally Posted by Tea and Two

Thank you for the reply! But Im still a little confused-
I have my kit lens from my old D5000, which I never use and two Nikon lenses a 18-200f/3.5-5.6 and the 35 prime. Both the Nikon lenses are DX so they fit my cropped sensor.
Im still confused if because a full frame 28mm lens will be cropped 1.5 on my D7000 wouldnt that esentaily for me make it a completely differnt focal lenth that Id be looking at though the lens?

Well, I would answer yes to your question. Since the image is cropped by the sensor because the sensor is smaller than the film size it was created for, your widest field of view will be the same as a 42 mm lens, and on the telephoto end it will look like a 112.5 mm lens.

[groovyone]

Originally Posted by rockpics

Well, I would answer yes to your question. Since the image is cropped by the sensor because the sensor is smaller than the film size it was created for, your widest field of view will be the same as a 42 mm lens, and on the telephoto end it will look like a 112.5 mm lens.

Compared to film or full frame though.

A full frame lens on APS-C at 28mm will look exactly like an APS-C lens on APS-C at 28mm.

[rockpics]

Originally Posted by groovyone

Compared to film or full frame though.

A full frame lens on APS-C at 28mm will look exactly like an APS-C lens on APS-C at 28mm.

True, but 28mm is about so-called "normal" field of view on APS-C, and it is wide on full frame.