billnikon Loc: Pennsylvania/Ohio/Florida/Maui/Oregon/Vermont

I own and use the first two lenses listed. The third one is a new release. It has gotten favorable reviews on many sites. The first two are great lenses. Like I said, one of them has been on every trip I have taken. I usually go with the 10-24, being just a little lighter that the 10-24 f4, and I pair it with the 18-200 lens.

retired2014 Loc: Indiana

What camera do you use these on?

amfoto1 Loc: San Jose, Calif. USA

There have been two different Tamron SP 10-24mm lenses. Both are "Di II" lenses exclusively for crop sensor cameras.

The recently introduced one now has "VC" image stabilization added and uses some new form of auto focus drive motor that Tamron calls "HLD" ("high/low modulated drive"). I have not used this new lens at all and can't really comment. Look for reviews of it online.

The original Tamron SP 10-24mm LD Aspherical has been around for quite a few years and didn't impress me very much. I tested it against Tokina AT-X 12-24mm f/4 DX, Tokina At-X 11-16mm f/2.8, Canon EF-S 10-22mm USM and Sigma 10-20mm f/4-5.6 EX DC. Among them, the Canon was the best of the bunch and the Tokina lenses were a close second and third place. The Sigma was fourth place and Tamron came in last due to cheaper feeling plastic construction, an "iffy" micro motor focus drive, rather soft images at some focal lengths and apertures. It wasn't terrible (in fact it was a big improvement over the old Tamron 11-18mm), but it wasn't as good as the other ultrawide zooms when I tried them. Hopefully the new version is an improvement. There also have been several iterations of the Sigma 10-20mm and I haven't tried them all. Even though it was the sharpest of them all, I put the Tokina 11-16mm in third place because it's extremely susceptible to flare problems (supposedly the 11-20mm f/2.8 that replaced it is much better... but it's also bigger and heavier).

I am REALLY glad I'm a Canon shooter when I look at the prices of the Nikkor AF-S 10-24mm f/3.5-4.5G ED DX ($900) and Nikkor AF-S 12-24mm f/4G IF-ED DX ($1150). Those prices are simply obscene!

retired2014 Loc: Indiana

I can see that I have a little to think about here. I had contacted our local camera shop and was told that the new Tamron 10-24 really was not a 10-24mm on a crop sensor. I'm confused by this because if it is not made for crop sensor cameras how can that be.
Anyway, thank you for the information. I will study it and keep researching.

BHC Loc: Strawberry Valley, JF, USA

10mm is 10mm. However, the field of view is that of a 15-30 lens.

retired2014 Loc: Indiana

Ok, it doesn't make sense to me, but I believe you.

BHC Loc: Strawberry Valley, JF, USA

The focal length of the lens does not change depending on the format of the camera, only the effect of that focal length on the size of the sensor.

billnikon Loc: Pennsylvania/Ohio/Florida/Maui/Oregon/Vermont

My only cropped camera now is the D500, but I also used these lenses on my D7100 and D7200. They worked on all three camera's but will work on any cropped sensor Nikon DSLR.

retired2014 Loc: Indiana

Okay. It just seems to me that since this lens is made for a cropped sensor camera that the length of the lens would be calibrated to that.I guess I just think differently.

billnikon Loc: Pennsylvania/Ohio/Florida/Maui/Oregon/Vermont

You would think that wouldn't you. But no, there is crop factor because of the size of the sensor. When digital came out sensors were very expensive, so, smaller was cheaper to produce, hence the crop camera. The crop factor 1.5 is just arithmetic (because of the size of the sensor), just have to adjust to it. So that 10-20 is a 15-30 on the crop and the 12-24 is a 18-36. So on and so on.

BHC Loc: Strawberry Valley, JF, USA

Your logic is sound. The difference may be as simple as the sensor being closer to the focal point to limit the size of the image cone, but the distance from the front element to the focal point will not change. This is, of course, the type of oversimplification that I tend to understand. Of course, I'm a bit long in the tooth; my college "computer" was a K&E or Pickett slide rule.

retired2014 Loc: Indiana

😃

rehess Loc: South Bend, Indiana, USA

No, that is exactly how a 10-20mm lens is supposed to behave on an APS-C sensor, so that is how it labeled.

To get that behavior on an FF sensor would require a different lens - a 15-30mm lens.

retired2014 Loc: Indiana

The ad I saw stated that this lens is made for an APS-C sensor. Someone mentioned that they wish the company would make one for an FF sensor. That's what's confusing me.

Spirit Vision Photography Loc: Behind a Camera.

The Sigma 10-20 is quite good too.