Canon EF 100mm f/2.8 Macro USM

And last two I promise...

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I posted this in the Macro section already but here

I just orderd mine! Can't wait to get it..... I better get a sharp copy =P

Winzzy wrote in post #5551639
I just orderd mine! Can't wait to get it..... I better get a sharp copy =P

I don't think I've seen any that weren't

Hi all 100mm f2.8 macro lens owner,

I just bought the 100mm f2.8 macro lens? Did some test shot and notice the center sharpness and contrast is peak at about f11 or f16. I am puzzle and hence posted a thread on " Center not sharp as apearture increase on 100mm macro?"

From your experience, what is the best apearture for the centre sharpness when you are at the minimal focal distance to the object?

One other question is when using the extension tube, how much closer can we get close to the object?

Thanks for sharing.

vinwin wrote in post #5554100
Hi all 100mm f2.8 macro lens owner,

I just bought the 100mm f2.8 macro lens? Did some test shot and notice the center sharpness and contrast is peak at about f11 or f16. I am puzzle and hence posted a thread on " Center not sharp as apearture increase on 100mm macro?"

From your experience, what is the best apearture for the centre sharpness when you are at the minimal focal distance to the object?

One other question is when using the extension tube, how much closer can we get close to the object?

Thanks for sharing.

That is quite normal. You will find that sharpness will drop off past about f/16 due to internal diffraction. This happens on all lenses to some degree, but the effect is most pronounced at macro distances.

To get around the shallow DOF in macro you should consider using stacking software instead of using smaller apertures.

photobitz wrote in post #5554301
That is quite normal. You will find that sharpness will drop off past about f/16 due to internal diffraction. This happens on all lenses to some degree, but the effect is most pronounced at macro distances.

To get around the shallow DOF in macro you should consider using stacking software instead of using smaller apertures.

What is "stacking software"?

This may be a dumb question. If the peak performance of the lens is at f/16, why would someone want to use the smaller apearture like f/22, f/29, f/32 when taking macro. Why a macro lens is design to have such small apearture when it no longer sharp at those small apeartures?

vinwin wrote in post #5560943
What is "stacking software"?

Stacking software essentially is software that allows you to combine just the sharp bits of several photographs of the same subject. When you do this at slightly different focusing distances, you can increase the DoF in a very dramatic way.

This is a technique which originated from and is often used in microphotography, but can be used for any kind of photography, provided the subject is static.

You could consider it the HDR of DoF, if you like, or HDoF .

This may be a dumb question. If the peak performance of the lens is at f/16, why would someone want to use the smaller apearture like f/22, f/29, f/32 when taking macro. Why a macro lens is design to have such small apearture when it no longer sharp at those small apeartures?

Because sometimes it is the only way to take a photograph of something. A slightly soft photograph may under certain conidtions be better than no photograph at all. Furthermore, not enlarging the photograph a lot may still result in an acceptable photograph, because it will look sharper at smaller magnifications than at larger ones.

Kind regards, Wim

hi all i'm intersted to buy this lens for general purpose, potrait and macro and indoor sports
i have question though, can this lens be fitted with 1.4x or 2x Tcon? canon or 3rd party one ?
and what f it's gonna be when fitted with 2x tcon ?
thank you , sorry i'm still beginner :P
thx.

10-Dee-Q wrote in post #5562665
hi all i'm intersted to buy this lens for general purpose, potrait and macro and indoor sports
i have question though, can this lens be fitted with 1.4x or 2x Tcon? canon or 3rd party one ?
and what f it's gonna be when fitted with 2x tcon ?
thank you , sorry i'm still beginner :P
thx.

There's a teleconvertor FAQ sticky in the Lenses Forum
My quick read says it can be fitted directly to the Sigma TCs, but doesn't mention it in the Canon TCs table.

I have used TCs with my Canon 100mm, but I put extension tubes between the camera body and the TC. It works. Can't remember, but pretty sure you don't get AF. Have to manually focus - but that's fine because you normally do with macro anyway.

Dorman wrote in post #5550991
And last two I promise...

love these!

Mine comes in on Friday, just in time for my trip to Sedona, AZ...

JakPot wrote in post #5563386
love these!

Thank you!

troypiggo wrote in post #5563035
There's a teleconvertor FAQ sticky in the Lenses Forum
My quick read says it can be fitted directly to the Sigma TCs, but doesn't mention it in the Canon TCs table.

I have used TCs with my Canon 100mm, but I put extension tubes between the camera body and the TC. It works. Can't remember, but pretty sure you don't get AF. Have to manually focus - but that's fine because you normally do with macro anyway.

actually i'm thinkin to fit 2x on 100 macro for potrait or wildlife use , so i don't need to buy another tele lens ,
anyone ever tried this before ?
and will my 450D able to AF ?
thank you,