What is the "sweetspot" for the 100mm f/2.8L IS Macro & the 70-200mm f/4L USM

[hamada]

WoW many useful SWEET SPOT from jrista

Yes, Last August!

Welcome to Canon Rumors. You should learn to look at the dates of the original posts. Old posts may no loonger be relavent.

Feel free to post some useful information, even starting your own topic.

if you don´t want old posts to pop up at the top... why not just close them after some time?
otherwise i don´t see a reason for such a reply.

 

[shutterlag]

This is useful:

http://www.the-digital-picture.com/Reviews/ISO-12233-Sample-Crops.aspx?Lens=674&Camera=453&Sample=0&FLI=0&API=0&LensComp=104&CameraComp=453&SampleComp=0&FLIComp=2&APIComp=0

I bought two lenses and I prefer to take most of my shots near or on the mythical sweetspot in regards to aperture. With the presumption of sufficient light, for my 50mm f/1.4 I try to stay between 2.8 and 4.0. For my 24-105mm f/4 I make an effort to approach f/8, but that isn't always an option.

So that raises the aforementioned question. What aperture range is the 100mm and the 70-200 the sharpest? And don't hesitate to tell me that I was wrong about the 50 and 24-105... if indeed I'm way off.

Thanks a bunch.

 

[distant.star]

WoW many useful SWEET SPOT from jrista

Yes, Last August!

Welcome to Canon Rumors. You should learn to look at the dates of the original posts. Old posts may no loonger be relavent.

Feel free to post some useful information, even starting your own topic.

if you don´t want old posts to pop up at the top... why not just close them after some time?
otherwise i don´t see a reason for such a reply.

Good point. It's not like they're bread on a grocery store shelf.

 

[Artifex]

From my personal experience with the 100mm f/2.8L, I would say f/5.6, though I have not done any formal testing on it. It is a really awesome lens BTW!

 

[jdramirez]

3.5 to 5.6 per DP Review.

http://www.dpreview.com/lensreviews/canon_100_2p8_is_usm_c16/4

The lens is sharp all the way through, from 2.8 through f/11... then it starts to hit the other side of the bell curve.

I really love the lens... it is my favorite over my 50mm f/1.4, 24-105, and 8mm fisheye (but that is completely different). I did just get a 70-200mm f/2.8L IS mkii today... so it is possible that will become my new favorite. I was looking at the DP and comparing the two lenses, and the 70-200 is supposed to be nearly as sharp as my 100mm. I guess the proof will be in the pudding.

 

[Mt Spokane Photography]

WoW many useful SWEET SPOT from jrista

Yes, Last August!

Welcome to Canon Rumors. You should learn to look at the dates of the original posts. Old posts may no loonger be relavent.

Feel free to post some useful information, even starting your own topic.

if you don´t want old posts to pop up at the top... why not just close them after some time?
otherwise i don´t see a reason for such a reply.

Do you understand that the OP was asking for help last August??


Do you think that answering now is going to help him??

 

[jdramirez]

WoW many useful SWEET SPOT from jrista

Yes, Last August!

Welcome to Canon Rumors. You should learn to look at the dates of the original posts. Old posts may no loonger be relavent.

Feel free to post some useful information, even starting your own topic.

if you don´t want old posts to pop up at the top... why not just close them after some time?
otherwise i don´t see a reason for such a reply.

Do you understand that the OP was asking for help last August??


Do you think that answering now is going to help him??

I didn't get a good answer the last go round... so maybe (as I'm the OP). Having said that, I did find the answer.

 

[jrista]

WoW many useful SWEET SPOT from jrista

Yes, Last August!

Welcome to Canon Rumors. You should learn to look at the dates of the original posts. Old posts may no loonger be relavent.

Feel free to post some useful information, even starting your own topic.

if you don´t want old posts to pop up at the top... why not just close them after some time?
otherwise i don´t see a reason for such a reply.

Do you understand that the OP was asking for help last August??


Do you think that answering now is going to help him??

I didn't get a good answer the last go round... so maybe (as I'm the OP). Having said that, I did find the answer.

In all honesty, the quickest and relatively cheap way to answer that question is to buy Reikan FoCal, and run your lenses through the Aperture test. It will take a series of shots at each aperture, measure them (I believe it just does an L/PH evaluation, but it might be something more like SQF), and plot the results on a chart. At the end, it will strait up tell you which aperture produces the best quality on YOUR GEAR.

 

[jdramirez]

In all honesty, the quickest and relatively cheap way to answer that question is to buy Reikan FoCal, and run your lenses through the Aperture test. It will take a series of shots at each aperture, measure them (I believe it just does an L/PH evaluation, but it might be something more like SQF), and plot the results on a chart. At the end, it will strait up tell you which aperture produces the best quality on YOUR GEAR.

What I found is that the 100mm I have is a really nice lens... so I can shoot at 2.8 or 8, and I will be more than happy with the results. I think that is partly why I'm not willing to part with my 50mm f/1.4... because I'd much rather have a lens that is sharp with good results at any aperture rather than having to always stop down the 50 to f/2.8 to get decent results.