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01-20-2020, 10:45 AM   #1
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Tamron macro lens

Hello,
Whatís that Tamron macro lens thatís supposed to be so good? Is it a 70mm, or 90mm?
Thank you

01-20-2020, 10:52 AM   #2
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here are the reviews of tamron lenses

Tamron Lenses - Pentax Lens Review Database

and tamron adaptall lenses

Tamron Adaptall Lenses - Pentax Lens Review Database

you may be thinking of this one:

Tamron SP AF 90mm F2.8 Di Macro Lens Reviews - Tamron Lenses - Pentax Lens Review Database

I have no personal experience with that lens

I have a D FA 100mm F2.8 Macro ( not the WR version)
01-20-2020, 11:08 AM - 5 Likes   #3
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QuoteOriginally posted by TerryL Quote
Hello,
Whatís that Tamron macro lens thatís supposed to be so good? Is it a 70mm, or 90mm?
Thank you
Tamron did not produce a dedicated 70mm macro lens, however Sigma did so maybe that is what you are thinking of.

All of the Tamron 90's are excellent performers, as macro lenses tend to be.

I use theTamron Adaptall-2 SP 90mm f/2.5 (52BB) and find it to be wonderful.










01-20-2020, 11:11 AM   #4
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if the OP wanted to take the time, I would advise looking at photos posted here to see what others have used for macro photography

*Macro* lens club - PentaxForums.com

01-20-2020, 11:30 AM   #5
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confirming the above, no 70mm for Tamron, but the Sigma 70mm macro is a stunner...

that being said, I have a copy of both the 52B and the 72B 90mm macros from Tamron's Adaptall line and both are amazing...
01-20-2020, 12:15 PM   #6
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QuoteOriginally posted by pepperberry farm Quote
confirming the above, no 70mm for Tamron, but the Sigma 70mm macro is a stunner...

that being said, I have a copy of both the 52B and the 72B 90mm macros from Tamron's Adaptall line and both are amazing...
That must be it. I’m so glad you replied, because I knew you would know. Thank you.

---------- Post added 01-20-20 at 12:17 PM ----------

QuoteOriginally posted by aslyfox Quote
if the OP wanted to take the time, I would advise looking at photos posted here to see what others have used for macro photography

*Macro* lens club - PentaxForums.com
Oh my gosh, Iíve got the time. Thanks for the link.

---------- Post added 01-20-20 at 12:22 PM ----------

QuoteOriginally posted by luftfluss Quote
Tamron did not produce a dedicated 70mm macro lens, however Sigma did so maybe that is what you are thinking of.

All of the Tamron 90's are excellent performers, as macro lenses tend to be.

I use theTamron Adaptall-2 SP 90mm f/2.5 (52BB) and find it to be wonderful.









Wow! Yea, I think thatís the photographer as much as the lens. Amazing photos.

---------- Post added 01-20-20 at 12:26 PM ----------

QuoteOriginally posted by aslyfox Quote
here are the reviews of tamron lenses

Tamron Lenses - Pentax Lens Review Database

and tamron adaptall lenses

Tamron Adaptall Lenses - Pentax Lens Review Database

you may be thinking of this one:

Tamron SP AF 90mm F2.8 Di Macro Lens Reviews - Tamron Lenses - Pentax Lens Review Database

I have no personal experience with that lens

I have a D FA 100mm F2.8 Macro ( not the WR version)
I have the 100mm, too. I may go the manual focus route and get the Irix 150 mm.

---------- Post added 01-20-20 at 12:27 PM ----------

QuoteOriginally posted by aslyfox Quote
here are the reviews of tamron lenses

Tamron Lenses - Pentax Lens Review Database

and tamron adaptall lenses

Tamron Adaptall Lenses - Pentax Lens Review Database

you may be thinking of this one:

Tamron SP AF 90mm F2.8 Di Macro Lens Reviews - Tamron Lenses - Pentax Lens Review Database

I have no personal experience with that lens

I have a D FA 100mm F2.8 Macro ( not the WR version)
I have the 100mm, too. I may go the manual focus route and get the Irix 150 mm.
01-20-2020, 12:49 PM - 1 Like   #7
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QuoteOriginally posted by TerryL Quote
Wow! Yea, I think that’s the photographer as much as the lens. Amazing photos.
Thank you. My "secret" is a I tote a small, lightweight resin stool around with me. That way I can sit, brace my elbows on my knees and make myself a tripod.



QuoteQuote:
I have the 100mm, too. I may go the manual focus route and get the Irix 150 mm.
What disappoints me about the Irix 150 is the minimum working distance is 34cm - that's just 4cm further away than the Pentax 100 Macro.
01-20-2020, 12:53 PM   #8
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QuoteOriginally posted by TerryL Quote
That must be it. Iím so glad you replied, because I knew you would know. Thank you.
---------- Post added 01-20-20 at 12:26 PM ----------

[/COLOR]
I have the 100mm, too. I may go the manual focus route and get the Irix 150 mm.
you're welcome....

flickr albums for my macro lenses -

Tamron 52B:

Tamron Adaptall-2 SP 52B 90mm f2.5 Macro (M42) | Flickr


Tamron 72B:

Tamron Adaptall-2 SP 72B - 90mm f2.8 Macro | Flickr


Sigma 70mm EX DG:

Sigma 70mm f2.8 EX DG Macro | Flickr


and, newly arrived, the Irix 150mm Macro:

Irix 150mm f2.8 Macro (Dragonfly) | Flickr

01-20-2020, 02:15 PM - 1 Like   #9
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QuoteOriginally posted by luftfluss Quote
What disappoints me about the Irix 150 is the minimum working distance is 34cm - that's just 4cm further away than the Pentax 100 Macro.
Focus breathing...

Addendum: It's overall length relative to the Pentax is also a factor. BTW...MFD and working distance are two different things; MFD being measured to the focal plane. Working distance at 1:1 for the Pentax is 130mm* with the Irix dialing in at a little under 160mm** for a difference of only 3cm. By comparison, my Dine 105mm is 131mm.


Steve

* Per Pentax Forums detailed review

** 340mm MFD - (Overall length of 135mm + flange focal distance of 45.5mm)

Last edited by stevebrot; 01-20-2020 at 02:51 PM.
01-20-2020, 02:28 PM - 1 Like   #10
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QuoteOriginally posted by stevebrot Quote
Focus breathing...

Addendum: It's overall length relative to the Pentax is also a factor.


Steve


and the weight difference is difficult to ignore....
01-20-2020, 04:00 PM - 1 Like   #11
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QuoteOriginally posted by luftfluss Quote
Tamron did not produce a dedicated 70mm macro lens, however Sigma did so maybe that is what you are thinking of.

All of the Tamron 90's are excellent performers, as macro lenses tend to be.

I use theTamron Adaptall-2 SP 90mm f/2.5 (52BB) and find it to be wonderful.









Wow! great shots! I'm gonna hafta get my 52BB out more often.
01-20-2020, 04:06 PM   #12
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QuoteOriginally posted by luftfluss Quote
Thank you. My "secret" is a I tote a small, lightweight resin stool around with me. That way I can sit, brace my elbows on my knees and make myself a tripod.



What disappoints me about the Irix 150 is the minimum working distance is 34cm - that's just 4cm further away than the Pentax 100 Macro.
Where does the minimum working distance come into play?
01-20-2020, 04:20 PM - 1 Like   #13
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QuoteOriginally posted by TerryL Quote
Where does the minimum working distance come into play?
When I am shooting macros, often I'm trying to get maximum magnification - as close to the subject (usually an insect) as the lens allows. With a 90mm or 100mm macro lens, this is usually around 30cm away from the camera sensor. For the legendary Pentax A* 200/4 Macro, the minimum working distance is nearly twice as far - 55cm! Having the minimum working distance being further away is useful because you are less likely to bother the insect, and also less likely to cast a shadow while shooting with the sun at your back.

Edit: as @stevebrot points out, I really should not be conflating "minimum working distance" with "minimum focus distance", but I'm afraid to change the terminology mid-discussion. The same principles apply to both, though. What it boils down to is with both the Pentax 100mm Macro and Irix 150mm Macro, you have to set yourself at a similar distance from your macro subject in order to get true 1:1 magnification. So, for my use, there is no improvement going from a 90 or 100mm macro to the Irix 150mm.

Last edited by luftfluss; 01-20-2020 at 04:26 PM.
01-20-2020, 04:29 PM   #14
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as mentioned it depends on your target if you are intending to get 1:1

animals/insects, it may be best to have a larger distance between you and your target

in a controlled environment, taking photos of stamps or coins for example, you may not need as much distance

QuoteQuote:
. . . Pentax currently offers three autofocus macro lenses: the DA 35mm F2.8 Limited Macro, D FA 50mm F2.8 Macro, and D FA 100mm F2.8 Macro. Tamron also makes a 90mm F2.8 Macro. Note that the longer the focal length, the farther away you can be while maintaining life-size magnification. . . .

Read more at: The Advantages of a Dedicated Macro

Lens - Tutorial Videos | PentaxForums.com
01-20-2020, 06:55 PM   #15
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At one time, I think Tamron used to make lenses for Pentax and the only difference was the Pentax super-multilayer coatings (optical formulas and mechanics were identical). That could well be the case for the Tamron 90mm. I have that lens and it is a fantastic lens. I've used it with the K-1 and it taxes the resolution of the K-1. Autofocusing is quick and accurate and I've used it clear down to 1:1 and it still performs. It gets a bit soft when stopped down to its limit which is not unexpected due to diffraction at those apertures but they do allow a greater depth of field. Great lens.
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