DSLRUsers.com

Posted: **Wed Jan 18, 2006 11:57 am**

took two pics and they have only one difference so i would like to know which one you like better ?

No 1...

No 2 ...

Posted: **Wed Jan 18, 2006 3:48 pm**

I like number two better... It seems sharper? :?:

Posted: **Wed Jan 18, 2006 3:51 pm**

#2 as the background is nice and smooth so less distracting then in #1.

Posted: **Wed Jan 18, 2006 3:55 pm**

#2... sharpness and dof.

cheers

Posted: **Wed Jan 18, 2006 3:58 pm**

#2 - sharper ... but dead?
Rel

Posted: **Wed Jan 18, 2006 4:12 pm**

I think I know what you've done here Shane but I'm not a betting man...

Prefer the second due to it's clarity - no competition.

Posted: **Wed Jan 18, 2006 4:16 pm**

huh? I am sick you know

Posted: **Wed Jan 18, 2006 4:20 pm**

blacknstormy wrote:huh? I am sick you know

Sorry Rel - I was thinking about your response while writing mine... Now I need a lie down!

My apologies Shane - but my choice remains the same. :wink:

Posted: **Wed Jan 18, 2006 6:15 pm**

the difference was ...
No 1 at f32
No 2 at f8

speed difference to suit.
taken with the Tamron 90 macro using the tripod and mirror lockup.

i thought the first one would be sharper and with more DOF but it surprised me and turned out the opposite.
I will have to rethink the way i do macros from now on.

Posted: **Thu Jan 19, 2006 12:17 am**

I found the same thing...

Diffraction plays a part at F32... When I was using my 180mm macro + 68mm extension tubes + 1.4x tc I was finding that using too small an appature resulted in very blurry pics... Much frustration followed until I learned about diffraction

Paul

Posted: **Thu Jan 19, 2006 12:32 am**

I have the same lens but for a Nikon... i found the sweet spot for the tamron is f22... works like a charm and most of my images come out pretty good at that dof

Tim

Posted: **Thu Jan 19, 2006 3:49 pm**

thanks, will remember to go no lower than that

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bug macro pic

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