Tamron 90mm variants

no694terry · 09-26-2012, 06:16 AM

There’s a Tamron 90mm SP AF 2.8 on ebay but its not the newer Di . Anyone familiar with the differences?

Last edited by no694terry; 09-26-2012 at 07:27 AM.

bricamry · 09-26-2012, 07:04 AM

better will be tamron 60/2, i thing, have IF and is cheaper

no694terry · 09-26-2012, 07:26 AM

Doesnt look like the plan a pentax mount for that one

**Deimos** · 09-26-2012, 07:36 AM

There is a 90 Di in the marketplace at the moment (

)

I think one of the biggest differences is coatings optimized for digital. Not sure if the older version has the focus limiter either

**Lowell Goudge** · 09-26-2012, 08:29 AM

Originally posted by no694terry

There’s a Tamron 90mm SP AF 2.8 on ebay but its not the newer Di . Anyone familiar with the differences?

AF lenses with no Di or Dii classification are full frame lenses released prior to digital cameras and full frame or cropped sensors.

the difference is as a minimum that the coatings on the rear element are not specifically designed to avoid reflection and loss of contrast due to the sensor (and uv filter in front of it) being more reflective than film.

a similar issue exists with Sigma.

For general information note the following

No Designation = film lens
Tamron Di or Sigma DG = Full frame with coatings for Digital
Tamron Dii or Sigma DC = Cropped Sensor with coatings for Digital

Jean Poitiers · 09-26-2012, 09:37 AM

Originally posted by Lowell Goudge

...

No Designation = film lens
Tamron Di or Sigma DG = Full frame with coatings for Digital
Tamron Dii or Sigma DC = Cropped Sensor with coatings for Digital

Thanks Lowell for the info ... didn't previously quite grasp/notice what the Dii difference was ... got it now.

JinDesu · 09-26-2012, 09:42 AM

Originally posted by Lowell Goudge

AF lenses with no Di or Dii classification are full frame lenses released prior to digital cameras and full frame or cropped sensors.

the difference is as a minimum that the coatings on the rear element are not specifically designed to avoid reflection and loss of contrast due to the sensor (and uv filter in front of it) being more reflective than film.

While true - I believe several users (not just Pentax users) have determined that the difference in effect from the Di coatings is negligible between the older and new lens. More than likely, it's not a lens that easily reflects due to the element placements and lens construction (Macro lenses tend to be very deep-set with their front element).

And since the glass is the same between the older and the newer, there is very little to distinguish in image quality between the two. The benefit of the newer lens, however, is that the Di has a bit nicer build (not as plastic) and looks cooler.

Originally posted by Deimos

There is a 90 Di in the marketplace at the moment (

)

I think one of the biggest differences is coatings optimized for digital. Not sure if the older version has the focus limiter either

It did.

bricamry · 09-26-2012, 10:13 AM

Originally posted by no694terry

Doesnt look like the plan a pentax mount for that one

oh, my mistake... than DA 100/2,8 macro wr

it is sharp wide open and aberating a bit

**Lowell Goudge** · 09-26-2012, 11:37 AM

Originally posted by JinDesu

While true - I believe several users (not just Pentax users) have determined that the difference in effect from the Di coatings is negligible between the older and new lens. More than likely, it's not a lens that easily reflects due to the element placements and lens construction (Macro lenses tend to be very deep-set with their front element).

it is not a question of a deep set front element, although that helps as it acts as a natural hood, but a question of the ghosting and reflection that may come off the sensor and be reflected back by the rear element.

Quote:

And since the glass is the same between the older and the newer, there is very little to distinguish in image quality between the two. The benefit of the newer lens, however, is that the Di has a bit nicer build (not as plastic) and looks cooler.

i will leave the astetics aside, each lens builder has their own approach, my sigma APO 70-200/2.8 EX (non DG) is identical to the DG version except for coatings. there is no difference in IQ between the two, however later DG Macro versions were not as sharp due to changes in optical formulas as well

no694terry · 09-26-2012, 03:30 PM

My 17-50 is a Di for aps-c I thought. Dont remember seeing Dii

msatlas · 09-27-2012, 10:57 AM

17-50 is Di II... Tamron SP 17-50mm F/2.8 Di II (model A16)

As for the Di vs. previous versions of 90mm f/2.8 macro, they're pretty much all the same optical formula. Comparison here: Variations of Tamron 90mm Macro lenses

Swift1 · 09-27-2012, 05:37 PM

Originally posted by Lowell Goudge

it is not a question of a deep set front element, although that helps as it acts as a natural hood, but a question of the ghosting and reflection that may come off the sensor and be reflected back by the rear element.

I agree.
I haven't really tried the Di 90/2.8, but I've used the old Adaptall SP 90/2.5 a fair bit and under certain conditions (mainly indoor product photos) I would get a large circular greenish bright area in the middle of the frame. I think the Di, DG, DA coating are supposed to correct this. I've also had this issue a bit with a FA 50/1.4

09-26-2012, 06:16 AM	#1
no694terry Veteran Member Join Date: Dec 2011 Photos: Gallery \| Albums Posts: 388	Tamron 90mm variants There’s a Tamron 90mm SP AF 2.8 on ebay but its not the newer Di . Anyone familiar with the differences? Last edited by no694terry; 09-26-2012 at 07:27 AM.

09-26-2012, 07:36 AM	#4
Deimos Site Supporter Join Date: Oct 2010 Location: Kingdom of Wonder Posts: 1,777	There is a 90 Di in the marketplace at the moment () I think one of the biggest differences is coatings optimized for digital. Not sure if the older version has the focus limiter either

09-26-2012, 09:42 AM	#7
JinDesu Veteran Member Join Date: Jun 2011 Location: New York City Photos: Gallery Posts: 5,638	Originally posted by Lowell Goudge AF lenses with no Di or Dii classification are full frame lenses released prior to digital cameras and full frame or cropped sensors. the difference is as a minimum that the coatings on the rear element are not specifically designed to avoid reflection and loss of contrast due to the sensor (and uv filter in front of it) being more reflective than film. While true - I believe several users (not just Pentax users) have determined that the difference in effect from the Di coatings is negligible between the older and new lens. More than likely, it's not a lens that easily reflects due to the element placements and lens construction (Macro lenses tend to be very deep-set with their front element). And since the glass is the same between the older and the newer, there is very little to distinguish in image quality between the two. The benefit of the newer lens, however, is that the Di has a bit nicer build (not as plastic) and looks cooler. Originally posted by Deimos There is a 90 Di in the marketplace at the moment () I think one of the biggest differences is coatings optimized for digital. Not sure if the older version has the focus limiter either It did.

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09-26-2012, 07:04 AM	#2
bricamry Forum Member Join Date: Jul 2012 Location: Prague, Czech republic Photos: Albums Posts: 82	better will be tamron 60/2, i thing, have IF and is cheaper

09-26-2012, 07:26 AM	#3
no694terry Veteran Member Join Date: Dec 2011 Photos: Gallery \| Albums Posts: 388 Original Poster	Doesnt look like the plan a pentax mount for that one

09-26-2012, 08:29 AM	#5
Lowell Goudge Site Supporter Join Date: Jan 2007 Location: Toronto Photos: Gallery \| Albums Posts: 17,888	Originally posted by no694terry There’s a Tamron 90mm SP AF 2.8 on ebay but its not the newer Di . Anyone familiar with the differences? AF lenses with no Di or Dii classification are full frame lenses released prior to digital cameras and full frame or cropped sensors. the difference is as a minimum that the coatings on the rear element are not specifically designed to avoid reflection and loss of contrast due to the sensor (and uv filter in front of it) being more reflective than film. a similar issue exists with Sigma. For general information note the following No Designation = film lens Tamron Di or Sigma DG = Full frame with coatings for Digital Tamron Dii or Sigma DC = Cropped Sensor with coatings for Digital

09-26-2012, 09:37 AM	#6
Jean Poitiers Pentaxian Join Date: Apr 2011 Location: Lost in translation ... Photos: Gallery \| Albums Posts: 18,076	Originally posted by Lowell Goudge ... No Designation = film lens Tamron Di or Sigma DG = Full frame with coatings for Digital Tamron Dii or Sigma DC = Cropped Sensor with coatings for Digital Thanks Lowell for the info ... didn't previously quite grasp/notice what the Dii difference was ... got it now.

09-26-2012, 10:13 AM	#8
bricamry Forum Member Join Date: Jul 2012 Location: Prague, Czech republic Photos: Albums Posts: 82	Originally posted by no694terry Doesnt look like the plan a pentax mount for that one oh, my mistake... than DA 100/2,8 macro wr it is sharp wide open and aberating a bit

09-26-2012, 11:37 AM	#9
Lowell Goudge Site Supporter Join Date: Jan 2007 Location: Toronto Photos: Gallery \| Albums Posts: 17,888	Originally posted by JinDesu While true - I believe several users (not just Pentax users) have determined that the difference in effect from the Di coatings is negligible between the older and new lens. More than likely, it's not a lens that easily reflects due to the element placements and lens construction (Macro lenses tend to be very deep-set with their front element). it is not a question of a deep set front element, although that helps as it acts as a natural hood, but a question of the ghosting and reflection that may come off the sensor and be reflected back by the rear element. Quote: And since the glass is the same between the older and the newer, there is very little to distinguish in image quality between the two. The benefit of the newer lens, however, is that the Di has a bit nicer build (not as plastic) and looks cooler. i will leave the astetics aside, each lens builder has their own approach, my sigma APO 70-200/2.8 EX (non DG) is identical to the DG version except for coatings. there is no difference in IQ between the two, however later DG Macro versions were not as sharp due to changes in optical formulas as well

09-26-2012, 03:30 PM	#10
no694terry Veteran Member Join Date: Dec 2011 Photos: Gallery \| Albums Posts: 388 Original Poster	My 17-50 is a Di for aps-c I thought. Dont remember seeing Dii

09-27-2012, 10:57 AM	#11
msatlas Veteran Member Join Date: Dec 2009 Location: Madison, WI Posts: 309	17-50 is Di II... Tamron SP 17-50mm F/2.8 Di II (model A16) As for the Di vs. previous versions of 90mm f/2.8 macro, they're pretty much all the same optical formula. Comparison here: Variations of Tamron 90mm Macro lenses

09-27-2012, 05:37 PM	#12
Swift1 Veteran Member Join Date: Sep 2009 Location: Oregon Photos: Gallery \| Albums Posts: 5,079	Originally posted by Lowell Goudge it is not a question of a deep set front element, although that helps as it acts as a natural hood, but a question of the ghosting and reflection that may come off the sensor and be reflected back by the rear element. I agree. I haven't really tried the Di 90/2.8, but I've used the old Adaptall SP 90/2.5 a fair bit and under certain conditions (mainly indoor product photos) I would get a large circular greenish bright area in the middle of the frame. I think the Di, DG, DA coating are supposed to correct this. I've also had this issue a bit with a FA 50/1.4