Arrived! Tamron 90mm F2.5 + Tamron Macro Extender (1:2-1:1)=Help please, how to attach?

[VancouverGirl]

Yaye, they came in the mail!

I am however still waiting on the adapter to connect my Tamron 90mm F2.5 lens to my Sony Nex 3.
--In the meantime, I was trying to attach these 2 lenses together but.............:>
1) I need someone to explain to me what I am doing wrong when I try to connect the 2 lenses together.
-I'm having trouble connecting the Tamron 90mm F2.5 to the Tamron Macro Extender because they don't fit.

2)I've enclosed 3 pics so you can see my lenses.

Thankyou for your assistance with this.

VG

 

[rjjr]

Here's some info I found about your lens. I couldn't find a manual.

http://themanualphotographer.co.uk/tamron-adaptall-2-sp-90mm-f2-5-macro-52bb/

And might there be an adaptall 2 ring involved for Canon/Nikn/Minolta/Pentax, etc. to attach it to a NEX adapter? I have a Tamron 80-210 3.8 BBAR MC Macro with an adaptall 2 ring for Minolta. I've used it on my A6000/A6300 with a MD-NEX dumb adapter.

 

[VancouverGirl]

Here's some info I found about your lens. I couldn't find a manual.

http://themanualphotographer.co.uk/tamron-adaptall-2-sp-90mm-f2-5-macro-52bb/

And might there be an adaptall 2 ring involved for Canon/Nikn/Minolta/Pentax, etc. to attach it to a NEX adapter? I have a Tamron 80-210 3.8 BBAR MC Macro with an adaptall 2 ring for Minolta. I've used it on my A6000/A6300 with a MD-NEX dumb adapter.

Hi, and thankyou for coming by. I appreciate it.

The adapter needed to attach the Tamron lens to my actual camera body is coming in the mail. That part is figured out.

1)The problem I am specifically having is how do I attach the other end of the Tamron 90mm f2.5 lens to the Tamron micro extension lens.

This is my problem.

2)Are you saying I need a 2nd adapter to place in between the Tamron 90 mm F2.5 lens and the Tamron 1:2-1:1 micro extender?

I'm new to this so please forgive me.

Thankyou for the link as well. I appreciate your coming by.

 

[rjjr]

Here's some info I found about your lens. I couldn't find a manual.

http://themanualphotographer.co.uk/tamron-adaptall-2-sp-90mm-f2-5-macro-52bb/

And might there be an adaptall 2 ring involved for Canon/Nikn/Minolta/Pentax, etc. to attach it to a NEX adapter? I have a Tamron 80-210 3.8 BBAR MC Macro with an adaptall 2 ring for Minolta. I've used it on my A6000/A6300 with a MD-NEX dumb adapter.

Hi, and thankyou for coming by. I appreciate it.

The adapter needed to attach the Tamron lens to my actual camera body is coming in the mail. That part is figured out.

1)The problem I am specifically having is how do I attach the other end of the Tamron 90mm f2.5 lens to the Tamron micro extension lens.

This is my problem.

2)Are you saying I need a 2nd adapter to place in between the Tamron 90 mm F2.5 lens and the Tamron 1:2-1:1 micro extender?

I'm new to this so please forgive me.

Thankyou for the link as well. I appreciate your coming by.

An original Adaptall 2 ring shouldn't be required if you are getting the Tamron Adaptall 2 - NEX adapter such as the one in this link:

https://www.amazon.com/Fotodiox-Adapter-Tamron-Adaptall-Mirrorless/dp/B0054EORII

I'm not seeing a reason why the Extender shouldn't fit the lens. You should just have to align the green dots on the the extender and lens and then twist it.

I just found a you tube on how to change/install an Adaptall 2 ring. Below is a link to the video. Installing the extender should be similar (sorry I didn't find it earlier):

 

[VancouverGirl]

Here's some info I found about your lens. I couldn't find a manual.

http://themanualphotographer.co.uk/tamron-adaptall-2-sp-90mm-f2-5-macro-52bb/

And might there be an adaptall 2 ring involved for Canon/Nikn/Minolta/Pentax, etc. to attach it to a NEX adapter? I have a Tamron 80-210 3.8 BBAR MC Macro with an adaptall 2 ring for Minolta. I've used it on my A6000/A6300 with a MD-NEX dumb adapter.

Hi, and thankyou for coming by. I appreciate it.

The adapter needed to attach the Tamron lens to my actual camera body is coming in the mail. That part is figured out.

1)The problem I am specifically having is how do I attach the other end of the Tamron 90mm f2.5 lens to the Tamron micro extension lens.

This is my problem.

2)Are you saying I need a 2nd adapter to place in between the Tamron 90 mm F2.5 lens and the Tamron 1:2-1:1 micro extender?

I'm new to this so please forgive me.

Thankyou for the link as well. I appreciate your coming by.

An original Adaptall 2 ring shouldn't be required if you are getting the Tamron Adaptall 2 - NEX adapter such as the one in this link:

https://www.amazon.com/Fotodiox-Adapter-Tamron-Adaptall-Mirrorless/dp/B0054EORII

I'm not seeing a reason why the Extender shouldn't fit the lens. You should just have to align the green dots on the the extender and lens and then twist it.

I just found a you tube on how to change/install an Adaptall 2 ring. Below is a link to the video. Installing the extender should be similar (sorry I didn't find it earlier):

Hi Rjjr!

Got it!

Your directing me to the green dots are what did it. THANKYOU.

I followed your instruction aligning the green dots and took off the plastic hood duh and then turned a lens around and realized I'd been trying to attach the wrong side lol. I'm new don't laugh lol.

Yaye I have a working lens with macro! Now just waiting for the Adaptall 2 Nex Adapter which is also enroute!

I really like this forum. Thankyou to everyone that has come by to help me. I sincerely appreciate your time!

 

[rjjr]

Here's some info I found about your lens. I couldn't find a manual.

http://themanualphotographer.co.uk/tamron-adaptall-2-sp-90mm-f2-5-macro-52bb/

And might there be an adaptall 2 ring involved for Canon/Nikn/Minolta/Pentax, etc. to attach it to a NEX adapter? I have a Tamron 80-210 3.8 BBAR MC Macro with an adaptall 2 ring for Minolta. I've used it on my A6000/A6300 with a MD-NEX dumb adapter.

Hi, and thankyou for coming by. I appreciate it.

The adapter needed to attach the Tamron lens to my actual camera body is coming in the mail. That part is figured out.

1)The problem I am specifically having is how do I attach the other end of the Tamron 90mm f2.5 lens to the Tamron micro extension lens.

This is my problem.

2)Are you saying I need a 2nd adapter to place in between the Tamron 90 mm F2.5 lens and the Tamron 1:2-1:1 micro extender?

I'm new to this so please forgive me.

Thankyou for the link as well. I appreciate your coming by.

An original Adaptall 2 ring shouldn't be required if you are getting the Tamron Adaptall 2 - NEX adapter such as the one in this link:

https://www.amazon.com/Fotodiox-Adapter-Tamron-Adaptall-Mirrorless/dp/B0054EORII

I'm not seeing a reason why the Extender shouldn't fit the lens. You should just have to align the green dots on the the extender and lens and then twist it.

I just found a you tube on how to change/install an Adaptall 2 ring. Below is a link to the video. Installing the extender should be similar (sorry I didn't find it earlier):

Hi Rjjr!

Got it!

Your directing me to the green dots are what did it. THANKYOU.

I followed your instruction aligning the green dots and took off the plastic hood duh and then turned a lens around and realized I'd been trying to attach the wrong side lol. I'm new don't laugh lol.
Yaye I have a working lens with macro! Now just waiting for the Adaptall 2 Nex Adapter which is also enroute!
I really like this forum. Thankyou to everyone that has come by to help me. I sincerely appreciate your time!

No problem, glad it worked out.. Enjoy your macro. Macro is one of my favorite genres.

 

[Parry Johnson]

There are a couple of things to watch out for:

Make sure you're setting the lens aperture to the widest setting (f2.5 for this lens) before attaching the mount (or matched teleconverter). The adapters have either one or two prongs that slide into threcessed notch(es) on the aperture ring. Those tabs need to be in place or your lens aperture won't work. (Those prongs sometimes come bent on a used adapter.)

Also, you may find that 1:2X magnification is plenty with that lens (and no extension lens). That extra part adds a lot of glass, which cuts down considerably on light and decreases the optical quality. (Every teleconverter does that.). Since macro is a field where you can often take the time to compose a shot, you probably won't miss using that extra piece.

Enjoy the new lens. You'll find it to be much better than you might expect!

 

[Parry Johnson]

Whoops! I didn't realize this was just the extent ion tube -- scratch most of that last comment -- there's no lens, so it'll only cut down a bit on light (inverse square law with longer light travel distance to the sensor plane), not image quality.

 

[fotowbert]

Whoops! I didn't realize this was just the extent ion tube -- scratch most of that last comment -- there's no lens, so it'll only cut down a bit on light (inverse square law with longer light travel distance to the sensor plane), not image quality.

Thank you for the correction about the Tamron 90/2.5 marco's dedicated extension tube having no lens elements.

I must however take exception to your description of the lens extension light loss being "only cut down a bit".

Based upon the exposure magnification equation in the Tamron instruction sheet that came with my model 18F extension tube there is a 2 stop loss at 1:1 image magnification. Even without the extension tube you get a 1.17 stop loss by just racking the 90/2.5 out to half life-size.

This 1 to 2 stop loss was certainly significant in my case as I was at that time forced to use an external exposure meter while shooting color transparency film. I simplified the exposure correction process by painting 1 to 4 white dots on the lens focusing ring to indicate how many 1/2 stops of corrections to apply. Of course when TTL metering is available the extension factor is automatically compensated for.

• John

--
"[If you don't sweat the details] the magic doesn't work." Brooks, F. P., The Mythical Man-Month, Addison-Wesley, 1975, page 8.

 

[Parry Johnson]

Whoops! I didn't realize this was just the extent ion tube -- scratch most of that last comment -- there's no lens, so it'll only cut down a bit on light (inverse square law with longer light travel distance to the sensor plane), not image quality.

Thank you for the correction about the Tamron 90/2.5 marco's dedicated extension tube having no lens elements.

I must however take exception to your description of the lens extension light loss being "only cut down a bit".

Based upon the exposure magnification equation in the Tamron instruction sheet that came with my model 18F extension tube there is a 2 stop loss at 1:1 image magnification. Even without the extension tube you get a 1.17 stop loss by just racking the 90/2.5 out to half life-size.

This 1 to 2 stop loss was certainly significant in my case as I was at that time forced to use an external exposure meter while shooting color transparency film. I simplified the exposure correction process by painting 1 to 4 white dots on the lens focusing ring to indicate how many 1/2 stops of corrections to apply. Of course when TTL metering is available the extension factor is automatically compensated for.

• John

 

[VancouverGirl]

There are a couple of things to watch out for:

Make sure you're setting the lens aperture to the widest setting (f2.5 for this lens) before attaching the mount (or matched teleconverter). The adapters have either one or two prongs that slide into threcessed notch(es) on the aperture ring. Those tabs need to be in place or your lens aperture won't work. (Those prongs sometimes come bent on a used adapter.)

Also, you may find that 1:2X magnification is plenty with that lens (and no extension lens). That extra part adds a lot of glass, which cuts down considerably on light and decreases the optical quality. (Every teleconverter does that.). Since macro is a field where you can often take the time to compose a shot, you probably won't miss using that extra piece.

Enjoy the new lens. You'll find it to be much better than you might expect!

Okay this is all very good advice holy smokes. You're very specific THANKYOU.

I can see the prongs you're talking about so now I know to take care making sure they are in place or my lens aperture won't work PLUS to have the lens aperture at the widest setting f2.5 for my lens.

Great! I have a good starting point for shots. Just waiting on my connector adapter.

Plus, I'm glad you specifically explained the "light" challenges if I use the 1:1. I have a website I started selling a line of rings. Good to bring to my attention, how teleconverters affect light from the reduction aspect.

I'll see how much detail I can get with the 1:2 and cropping. Great advice!!!!

Thankyou very much for your contribution. Very helpful indeed!

 

[VancouverGirl]

Whoops! I didn't realize this was just the extent ion tube -- scratch most of that last comment -- there's no lens, so it'll only cut down a bit on light (inverse square law with longer light travel distance to the sensor plane), not image quality.

Okay oops..................so my Tamron macro extender 1:2 - 1:1 will cut down on light not image quallity? Got it!!!
**I'll grab my "camera thesauras" to comprehend what you've explained in parenthesis above lol.

 

[VancouverGirl]

Whoops! I didn't realize this was just the extent ion tube -- scratch most of that last comment -- there's no lens, so it'll only cut down a bit on light (inverse square law with longer light travel distance to the sensor plane), not image quality.

Thank you for the correction about the Tamron 90/2.5 marco's dedicated extension tube having no lens elements.

I must however take exception to your description of the lens extension light loss being "only cut down a bit".

Based upon the exposure magnification equation in the Tamron instruction sheet that came with my model 18F extension tube there is a 2 stop loss at 1:1 image magnification. Even without the extension tube you get a 1.17 stop loss by just racking the 90/2.5 out to half life-size.

This 1 to 2 stop loss was certainly significant in my case as I was at that time forced to use an external exposure meter while shooting color transparency film. I simplified the exposure correction process by painting 1 to 4 white dots on the lens focusing ring to indicate how many 1/2 stops of corrections to apply. Of course when TTL metering is available the extension factor is automatically compensated for.

• John

 

[VancouverGirl]

Whoops! I didn't realize this was just the extent ion tube -- scratch most of that last comment -- there's no lens, so it'll only cut down a bit on light (inverse square law with longer light travel distance to the sensor plane), not image quality.

Thank you for the correction about the Tamron 90/2.5 marco's dedicated extension tube having no lens elements.

I must however take exception to your description of the lens extension light loss being "only cut down a bit".

Based upon the exposure magnification equation in the Tamron instruction sheet that came with my model 18F extension tube there is a 2 stop loss at 1:1 image magnification. Even without the extension tube you get a 1.17 stop loss by just racking the 90/2.5 out to half life-size.

This 1 to 2 stop loss was certainly significant in my case as I was at that time forced to use an external exposure meter while shooting color transparency film. I simplified the exposure correction process by painting 1 to 4 white dots on the lens focusing ring to indicate how many 1/2 stops of corrections to apply. Of course when TTL metering is available the extension factor is automatically compensated for.

• John

 

[PSCL1]

OP, do you really think all these struggles are worth it? Why not just buy a lens with brand-compatible AF lens mount, even if third party?

 

[fotowbert]

Whoops! I didn't realize this was just the extent ion tube -- scratch most of that last comment -- there's no lens, so it'll only cut down a bit on light (inverse square law with longer light travel distance to the sensor plane), not image quality.

Thank you for the correction about the Tamron 90/2.5 marco's dedicated extension tube having no lens elements.

I must however take exception to your description of the lens extension light loss being "only cut down a bit".

Based upon the exposure magnification equation in the Tamron instruction sheet that came with my model 18F extension tube there is a 2 stop loss at 1:1 image magnification. Even without the extension tube you get a 1.17 stop loss by just racking the 90/2.5 out to half life-size.

This 1 to 2 stop loss was certainly significant in my case as I was at that time forced to use an external exposure meter while shooting color transparency film. I simplified the exposure correction process by painting 1 to 4 white dots on the lens focusing ring to indicate how many 1/2 stops of corrections to apply. Of course when TTL metering is available the extension factor is automatically compensated for.

• John

Okay so you notice more considerable light reduction...........?

My reply is mostly a technical curiosity since TTL metering compensates for any extension tube loss assuming metering is done at the shooting magnification. However IMO a loss of up to 2 stops certainly qualifies as more than just "a bit" of loss.

As I said I didn't have the option of TTL metering and was shooting color slide film. That amount of exposure error is significant and potentially fatal in the event you aren't bracketing your exposures.

YOU SAID:> I simplified the exposure correction process by painting 1 to 4 white dots on the lens focusing ring to indicate how many 1/2 stops of corrections to apply.
ME:> This temp marking makes it easier as you use it for a guide then?

Yes. All I had to do was focus then look at the lens barrel to see where my markings were in relation to the distance index. That told me how many 1/2 stops of exposure was needed over my hand-held meter reading. I used 1/2 stop increments since that was the minimum exposure adjustment allowed by this lens and my Nikon N80. Too keep the exposure error with this approach to within +/- 1/4 stop it was necessary to advance the dots to be at the 1/4, 3/4, 1 1/4, and 1 3/4 stop positions.

EDIT: This was back in 2008 when I was still still shooting film and had moved from Canon manual focus T90s to Nikon AF N80. I now shoot digital exclusively and since purchasing a Tokina 100/2.8 macro a couple years ago the Tamron 90/2.5 isn't being used any longer. The Tamron served my well but be aware the lens has a reputation for producing a central spot due to entrance pupil reflection off your digital sensor being reflected back to the sensor from within the lens under certain lighting conditions.

• John

 

[Parry Johnson]

There are a couple of things to watch out for:

Make sure you're setting the lens aperture to the widest setting (f2.5 for this lens) before attaching the mount (or matched teleconverter). The adapters have either one or two prongs that slide into threcessed notch(es) on the aperture ring. Those tabs need to be in place or your lens aperture won't work. (Those prongs sometimes come bent on a used adapter.)

Also, you may find that 1:2X magnification is plenty with that lens (and no extension lens). That extra part adds a lot of glass, which cuts down considerably on light and decreases the optical quality. (Every teleconverter does that.). Since macro is a field where you can often take the time to compose a shot, you probably won't miss using that extra piece.

Enjoy the new lens. You'll find it to be much better than you might expect!

Okay this is all very good advice holy smokes. You're very specific THANKYOU.
I can see the prongs you're talking about so now I know to take care making sure they are in place or my lens aperture won't work PLUS to have the lens aperture at the widest setting f2.5 for my lens.

Great! I have a good starting point for shots. Just waiting on my connector adapter.
Plus, I'm glad you specifically explained the "light" challenges if I use the 1:1. I have a website I started selling a line of rings. Good to bring to my attention, how teleconverters affect light from the reduction aspect.
I'll see how much detail I can get with the 1:2 and cropping. Great advice!!!!
Thankyou very much for your contribution. Very helpful indeed!

You're welcome. Post some shots on this thread when you're ready. That lens should be a real keeper, and once you get the hang of photographing the micro world, you'll really appreciate other accessories like lighting, little reflectors, etc. Good luck on the jewellery business.

 

[Parry Johnson]

The Tamron served my well but be aware the lens has a reputation for producing a central spot due to entrance pupil reflection off your digital sensor being reflected back to the sensor from within the lens under certain lighting conditions.

You're quite correct about the "evil purple spot" problem with that lens. What Fotowbert was talking about was the near-perfectly flat rear element. Film was never completely flat like a dSLR's sensor, so it wasn't a problem in the film days. However, I've only noticed a purple glowing central reflection when I was using a combination of small aperture and shooting a high-contrast scene into strong backlighting (think of a dandelion in seed with the sun shining directly behind). For normal macro work, you really won't have any problems at all. You might have to boost the contrast a bit in post-processing, but otherwise that lens is plenty sharp to serve as a very useful piece of glass for a long time to come.

I bought my Tamron Adaptall 90mm f2.5 (older 49mm filter version) for $100 CDN used about 10 years ago and sold it for $125 two years ago. When you consider that most lenses depreciate, especially after heavy use, then I did quite well. I replaced it with a newer (better contrast, 1:1, even sharper) 90 f2.8 (non VC) at a good price ($399 new), but sometimes I miss the size, sturdy feel and nostalgia of the Adaptall. So, VancouverGirl, shoot all you want -- I think you made a good investment, especially if it'll make you more money through your jewellery sales.

By the way, I compared my "new" 90 to the (now older VC -- there's a newer version now), The Sigma, and Nikkor 105 VR. My newer 90 was the sharpest of the works, and had the best-looking background highlights (bokeh). Since I planned on using it for portraits, too, that was my best new option. (Plus the price -- couldn't beat that for a macro in this range.)

 

[Parry Johnson]

Whoops! I didn't realize this was just the extent ion tube -- scratch most of that last comment -- there's no lens, so it'll only cut down a bit on light (inverse square law with longer light travel distance to the sensor plane), not image quality.

Okay oops..................so my Tamron macro extender 1:2 - 1:1 will cut down on light not image quallity? Got it!!!
**I'll grab my "camera thesauras" to comprehend what you've explained in parenthesis above lol.

Basically, if you double the distance from a light source (2X), you get 1/4 the light falling on the subject (1 / 2x2). Since the front of your lens moves (much) further from the sensor when you focus at a shorter distance, there is less light actually falling on the sensor. Your f2.5 lens works as an f2.5 lens at infinity, but it's effectively an f3.5 lens at 1:2, and around f5 at 1:1.

 

[Parry Johnson]

So if you don't mind my asking, how much did you pay for that lens and 1:1 ring?