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Messages - K-amps

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1306
Lenses / Re: 70-200f2.8 mk.II vs 70-300L sharpness test
« on: December 03, 2011, 09:14:34 PM »
Thanks for the tests!  I will reiterate that using autofocus is not the best way to test lens sharpness, since you're not testing just the lens, but how well the lens is matched to the camera's AF.  Also, an angled ruler is a challenging target for the AF system. So, while I appreciate the efforts, and acknowledge this test has meaning for your camera+lenses, I don't believe the results can be generalized to these lenses as a group, due to the confound of using AF (with no ability to calibrate it).

I understand about generalizing the tests for all lenses.

However, grant me this... if I saw the numbers sharper at the higher or lower end of the scale (lets say 13" or 11" etc, then it would indicated forward or back focus, this is not the case, the lens is correctly focusing at 12"
 
The older 70-200 (1st pic) has a slight back focus, however it is still withing the dof and captures 12" at good sharpness.  The second is centered at 12" meaning it is optimally focussed.

Given that the slanted ruler, an inaccurate focus would be visible either up or below (instead of 12"), thus I still believe, this test is valid for this set of 3 lenses.

The proof is that maximal sharpness is visible between 11.5" to 12" for all lenses.

1307
Lenses / Re: 70-200f2.8 mk.II vs 70-300L sharpness test
« on: December 03, 2011, 05:40:12 PM »
The camera did not move from the tripod, I switched lenses while the camera was latched on to the tripod. I know it did not move. While I can understand what you are referring to, I would like to think that the focal lengths are referenced to the sensor, again which did not change in distance to the ruler.

If you check the exif information in each jpeg, it shows 200mm for each shot (if you care to download the attachments).

1308
Lenses / 70-200f2.8 mk.II vs 70-300L sharpness test
« on: December 03, 2011, 05:07:54 PM »
Did some tests as a result of a discussion on another thread. Comparing the sharpness of the 2 great lenses with the following test conditions: Subject shot = a Ruler placed 45 degrees on the wall and focused on the 12" mark.

Attached are 3 shots; 2 of the 70-200mk.ii (I have 2 copies, the old one is a refurb unit and the new one is a new unit bought from adorama) and the last 1 of the 70-300L

1) ISO = 100
2) F5.6 (favors the 70-200 slightly since it is natively larger aperture)
3) 5D mounted on tripod
4) camera jpeg used: zero PP done except 100% crop .
5) Spot AF at the 12" Mark. Did not MF since I seldom use MF with these 2 lenses; Spot AF relevant for my use.
6) Used various focal lengths but the attachments are for all 3 at 200mm
7) Ruler was vertically placed with top = higher numbers on scale. After cropped I turned the crops 90 degrees clockwise for better viewing.

Conclusion:

1) The 2 copies of the 70-200mk.II are very similar in sharpness and focal length
2) The 70-300L set at 200mm shows a smaller frame compared to the 70-200's not sure which one is accurate the 200's or the 300.
3) The 300 seems slightly sharper than both (though it is a toss) and has a greater DoF at f5.6 than the 200's.

Hope this helps people who are considering both:


1309
Canon General / Re: 15% Off at Canon Refurbished Store
« on: December 02, 2011, 04:37:57 PM »
15% would be an even better bargain if Canon would not slap sales tax on the final invoice value... BH/ Adormama etc are cheaper cause they don't put sales tax on top when shipping to Indiana.

1310
Lenses / Re: 70-200 f/2.8LisII with x1.4TC VS 70-300 f/4-5.6L
« on: December 02, 2011, 04:35:10 PM »
Not bad...pretty usable. I'd rather have this then miss a shot.

1311
Landscape / Re: Some new works.
« on: December 02, 2011, 03:24:37 PM »
Love the effect ! #1 and 3 are very well done.

I like the aspect ratio as well.... take it fomr a guy who has been printing 8x10 for the last 2 weeks and having to crop his hard work...  :P

What filters / PP have you used to get this effect?

1312
United States / Re: Prime lenses you currently own or on your wishlist.
« on: December 02, 2011, 02:33:39 PM »
I currently have (FF):
35mm f2 (indors)
50mm f1.4 (outdors and portrait)

Wish I had 80mm f1.2  and a macro prime (no matter the focal distance)

If funds are an issue... get the non-L 100f2.8 Macro. It is as sharp as the L, I still miss mine. A good MINT copy can be had on ebay for about $460, which is a bargain, when you consider, it takes nice portraits too.

1313
Lenses / Re: 70-200 f/2.8LisII with x1.4TC VS 70-300 f/4-5.6L
« on: December 02, 2011, 02:31:29 PM »
mostly the 70-300 goes on the 5DII and the 70-200II goes on the 7D/1D4 due to the use that I make of the different bodies.

In your case, they would have similar lengths and would be substitutes to each other; Interestingly, I was thinking the other way around  :):  70-200 on the FF for portraits and indoor shots and the 70-300 on the Crop for more reach, I don't need redundancy as much, I want range.

Agreed - that's why I use the 100-400mm on my 7D and the 70-200mm on my 5DII, for the most part.

I am sure you must have tried the 2x on the 100-400 on a 7D... Thats close to 1300mm equivalent !! Was the footage usable?

1314
Lenses / Re: 70-200 f/2.8LisII with x1.4TC VS 70-300 f/4-5.6L
« on: December 02, 2011, 01:16:53 PM »
I believe that the 70-300L is better at the 70-100 range than the 70-200II - however it may be better colour contrast . However this is personal preference based on A3 prints rather than some scientific test.

That said both lens are top draw - I am happy to have both  - mostly the 70-300 goes on the 5DII and the 70-200II goes on the 7D/1D4 due to the use that I make of the different bodies.

In your case, they would have similar lengths and would be substitutes to each other; Interestingly, I was thinking the other way around  :):  70-200 on the FF for portraits and indoor shots and the 70-300 on the Crop for more reach, I don't need redundancy as much, I want range.

1315
Lenses / Re: 70-200 f/2.8LisII with x1.4TC VS 70-300 f/4-5.6L
« on: December 02, 2011, 12:30:29 PM »

The usual testing procedure is to manually focus (10x live view) or better yet, focus bracket (and take the sharpest image) to compare sharpness across lenses.

Liveview? You are rubbing it in again  :P

1316
United States / Re: Prime lenses you currently own or on your wishlist.
« on: December 02, 2011, 11:37:57 AM »
50mm f1.8 mk.II
180mm f3.5L

Wish list: 135mmL f2

1317
Lenses / Re: 70-200 f/2.8LisII with x1.4TC VS 70-300 f/4-5.6L
« on: December 02, 2011, 11:26:07 AM »
The 70-200 is sharp and very nice overall, still... both copies not as sharp as my 70-300L.

Your experience differs from some of the reviews.  Are you basing the comparison on images where you used autofocus, and have you done an AF microadjustment for your lenses?

Not getting into a debate with you Neuro...  ;)  but to answer your question: Used AF but No micro adjustment since my 5Dc does not support it.  The refurbed one has some back focus issues on AF, at a distance of about 20ft from the subject, it will focus 6-7 inches deeper than the spot AF I choose. This is consistent (f2.8 ). When it does focus 6-7 inches back, the results are sharp. I posted a 100mm test in another thread, the newer one has less of this back focus bias, but when they do focus, the sharpness of both copies is similar. I posted a couple of quick shots here comparing the two 70-200's I have:  http://www.canonrumors.com/forum/index.php/topic,2262.15.html  towards the bottom of the page.

With my 70-300L, It is easier to make out the weave of the fabric of the subject clearer at similar distances compared to the 70-200f2.8.  Assuming both shot at 200mm. Granted I have not done set up formal tests for this scenario (200mm) , just going of experience...

I will set up more elaborate tests if you care to purchase the 70-300L, otherwise personally I am convinced my the 70-300L copy is sharper than both 70-200f2.8's which are pretty sharp on their own.

1318
Software & Accessories / Re: To HDR or Not To HDR
« on: December 02, 2011, 09:45:54 AM »

Basically, my point is that it took a lot of work over a few hours just to get this far, and i'm still not happy. Whether it's the fault of Hugin that is introducing the noise from the darkest shots in the dark-areas or what, I don't know. But I doubt that any automated-program or in-camera settings can get anywhere near this with no user input, at least for now...

Don't know what your preferences are... but I did a quick PP using elements on your last image, using the following tools:

Reversed some darkening gradient effects to the right.
Shadow/ Highlights
Contrast & Brightness

You can do much better with PS/ or even Viveza. Your shot has lots of potential !

1319
Software & Accessories / Re: To HDR or Not To HDR
« on: December 02, 2011, 09:21:52 AM »
Did you do a graduated exposure filt to the right of the frame? Looks very dark and a bit distracting. I agree with you it needs some work, but it also has potential... good footage to work with. The lead in lines have potential... I wonder if it is the modern architecture clashing with traditional in the background that is contributing to some of your grief...

1320
Lenses / Re: 70-200 f/2.8LisII with x1.4TC VS 70-300 f/4-5.6L
« on: December 02, 2011, 07:38:04 AM »
I have both. Actually currently have 2 copies of 70-200f28mk.ii (long story):  I think my 70-300L is sharper. I was going to sell it after I got the 70-200, but so far I am not feeling the urge.  The 70-200 is sharp and very nice overall, still... both copies not as sharp as my 70-300L.

As others have said it is easier to handle and great for travel/ walkabout. No need to monopod. Great lens.

your con would be cost of TC vs. 1350 or so.

Given a choice I would not get rid of the 70-200 either. It's great indoors, has a great Bokeh and an "X" factor that makes some pictures almost magical... 

Good luck.

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