Tamron SP90 Macro

[JPS]

I think that lens ROCKS !!!
For this shot, I used an old Sunpak "ring-flash", to test it... well, it looks like -although the "ring-flashes" have a reputation of "flattening" or "killing" the subjects- that it did quite a good job, didn't it ?

[Eddie the Gnat]

It is quite flat, but the subject really suits it. Beautiful!

Eddie.:)

[ballroom_boy]

I've got that same lens... it is AWESOME!

[smunky]

I think the flattening effect of the old ring flashes, make for some interesting Art photographs of abstract items. Such as this flower.
Except Id prefer these shots in B&W

[lightwrangler]

I'll add my praise for this lens. While I use it a lot for portraits, I also use it for closeups and product work.

[SHROOM]

JPS
Hmmm - Is that not a Pap. (polinia) !? At first I thought it was a Cymbidium but after looking closer decided it was not.
Ed

[lightwrangler]

Actually my shot is a rose, quite late in the season and therefore very open. The flower in JPS' shot is an orchid, I've got a shot pretty much like it. Here it is.

[JPS]

Originally posted by SHROOM
JPS
Hmmm - Is that not a Pap. (polinia) !? At first I thought it was a Cymbidium but after looking closer decided it was not.
Ed

...hmmm... all I know is that it's a flower ! ...I wish I knew more about all of them -as about many other things-, but I just have a lot of pleasure looking at them and shooting them...
Sorry... ;=p

[lightwrangler]

Sorry SHROOM, I re-read your email and I realise that you are looking for the exact type of orchid pictured. I can't help you with that. Guess I shouldn't answer forum questions late at night. :-)

[SHROOM]

Did not mean to wonder away from subject matter - exelent macro image of center of Cymbidium Orchid though ! what lens and settings were you using? The earlier image I thought was of extreemely rare - also orchid was the lens and settings same ?
That is what I do - image the small and delicate structures of orchid flowers and other small plants
Thank you for the return
Ed

I guess this should be addressed to JPS
Yes , - indeed the quest for knowledge is never ending! I am a ' senior citizen ' and I find something new and usefull to learn every day!

[JPS]

Hi Ed ! the datas for the "Cymbidium Orchid" (head of the thread) shot were:
Fuji S2 Pro with Tamron SP 90 f/2.8 macro - ORG-ORG-OFF - ISO 100 - 1:125 @ f/45.
I was trying out an old Sunpak ring-flash... I think it did quite a good job, didn't it ? ...in any case, it allowed me to use the smallest f-stop on the lens (f/45), hence adding a bit more DOF !
Glad you liked the pic...

[SHROOM]

Very good job Jean-Piere I am surprised about the circle light! I never could get good results with one. But then I don't have any lenses that I could stop down to f45 either !
How in the world did you get the f 45 out of that lens , I thought it went only to f 32 ! Did you use a negative density filter? to compensate for the balance ?

Ed

[JPS]

Originally posted by SHROOM
...How in the world did you get the f 45 out of that lens , I thought it went only to f 32 ! Did you use a negative density filter? to compensate for the balance ?
Ed

Hi Ed ! I don't know either ! I never use any filters. The Tamron SP90 is effectively given for f/32 at maximum, but I allready shot several times at f/45 ! ...maybe the aperture has a factor change when one use it in "macro"... perhaps when you get near 1:1, the relation size/aperture changes ?!?
...That's a good question though !!! I wish someone more "technically" involved in lens construction could explain that... if ever you find an answer, please let me know, will you ?

[SHROOM]

That trully is strange ! Not having had this lens myself I have not a clue how this works out Jean-Pierre But I will surely let you know when and if I find out . Perhaps the 'multiplier' comes in effect when flash is used !?

Ed

[psychronos]

actually it's not uncommon for macro lens to stop down even further when it passes a certain repro ratio as the extension gets longer, the more light you lose. I get f/54 with the 105/2.8 sometimes at 1:1, though I rarely shoot at that kind of magnification.