[auto210035]

Hi, I picked up a Tamron 70-300mm f/4.0-5.6 LD non-DI on KEH for $80. Anyone know what is the practical difference between the DI and non-DI? My research indicates that the DI has a special coating optimized for digital sensor, but I cannot find anyone's personal experience with both. Will this Tamron mount on the k100d without any adapter and will every function work such as autofocus and aperture adjustment?

[Jewelltrail]

The DI stands for "digitally integrated." From what I hear, most people do not distinguish a difference in pics between the two lenses, though I'm sure someone must. I shot with the non-DI version and was delighted with it. You have the reach of 70-300mm, Auto-focus, excellent sharpness up to 220mm, and not bad thereafter, all for $80. Very hard to duplicate that. I found the PFing, the obvious Achilles heel of this lens, to be controllable with careful framing and shot selection. Also, you will need to deal with hunting in lower light, and sometimes even in better light.

[auto210035]

The DI stands for "digitally integrated." From what I hear, most people do not distinguish a difference in pics between the two lenses, though I'm sure someone must. I shot with the non-DI version and was delighted with it. You have the reach of 70-300mm, Auto-focus, excellent sharpness up to 220mm, and not bad thereafter, all for $80. Very hard to duplicate that. I found the PFing, the obvious Achilles heel of this lens, to be controllable with careful framing and shot selection. Also, you will need to deal with hunting in lower light, and sometimes even in better light.

I wouldn't call it a great deal since I've heard people who have gotten the DI version for not much more, and new used to be $130. Seems like the price of lens just keeps increasing. Anyways, thanks for the clarification. Once I receive the lens, I'll take a few sample shots and post it here.

[Jewelltrail]

auto210035: I wouldn't call it a great deal since I've heard people who have gotten the DI version for not much more, and new used to be $130. Seems like the price of lens just keeps increasing.

Tell me a lens which gives you more for those few dollars? I do not think the performance of the Di is any better--like I said above. So what justifies its added costs?

Where have you been--the price of all lenses are increasing!!!

[tokyoso]

Hi, I picked up a Tamron 70-300mm f/4.0-5.6 LD non-DI on KEH for $80. Anyone know what is the practical difference between the DI and non-DI?

No idea really... probably no difference at all.

[auto210035]

Tell me a lens which gives you more for those few dollars? I do not think the performance of the Di is any better--like I said above. So what justifies its added costs?

Where have you been--the price of all lenses are increasing!!!

I've seen used di sold for lower, but who knows now. Prices have been all over the place. I'm actually starting to regret getting into the Pentax system when the price of lens are dramatically increasing.

[Jewelltrail]

auto210035: Prices have been all over the place. I'm actually starting to regret getting into the Pentax system when the price of lens are dramatically increasing.

I do not blame you one bit--many are in your shoes. A lot of it has to do with the yen vs the dollar though, not Pentax.