70-200 F4 IS sharpness issues

[Fructusbiz]

Great lens!
--
Best regards,
Eugene

 

[mfurman]

At 7 ft the problem is negligible. In my tests, it is bad for anything less than 5 ft. I am not sure how gradual the change is though. Once again it has to be > 180 mm focal length. It is very good at 150 mm
--
Michael

'People are crazy and times are strange, I'm locked in tight, I'm out of range, I used to care, but things have changed' - Bob Dylan

 

[mfurman]

--
Michael

'People are crazy and times are strange, I'm locked in tight, I'm out of range, I used to care, but things have changed' - Bob Dylan

 

[mfurman]

I think that it is soft (or there is lack of contrast) but one has to compare the shots at 135 and 200 mm

Here are mine (text):

200 mm

http://mfurman.smugmug.com/gallery/2842902#152519312-O-LB

135 mm

http://mfurman.smugmug.com/gallery/2842902#152519487-O-LB

These are typical, average shots for these focal length and MFD
--
Michael

'People are crazy and times are strange, I'm locked in tight, I'm out of range, I used to care, but things have changed' - Bob Dylan

 

[ed rader]

so five feet and less and only above 150mm and at f4? let me know and i'll do some tests (which i detest).

tripod and manual focus?

ed rader

--



'One often has mixed feelings about relatives, but few people could identify serious problems in their relationships with dogs.'

-- Anonymous

 

[mfurman]

It has to be longer than 180 mm and less than 5 feet. Extreme case: 200 mm and 4 ft.
--
Michael

'People are crazy and times are strange, I'm locked in tight, I'm out of range, I used to care, but things have changed' - Bob Dylan

 

[PIXSurgeon]

...but shot at 1/20 to 1/40 with IS!!!

Just wait until you see it... No trial-and-error, just one (1) shot and AF on 45-point "PJ" mode (some extra settings on 1D's Custom/Personal functions).

Stay tuned...

--

TIP: If you do not like this post, simply press the 'COMPLAINT' button. Mommy/Daddy are just one click away.

 

[FretNoMore]

...but shot at 1/20 to 1/40 with IS!!!

Just wait until you see it... No trial-and-error, just one (1)
shot and AF on 45-point "PJ" mode (some extra settings on 1D's
Custom/Personal functions).

Stay tuned...

--
TIP: If you do not like this post, simply press the 'COMPLAINT'
button. Mommy/Daddy are just one click away.

--

• Anders @ http://www.aobild.com *

 

[digitaldog]

I just received by 70-200 F4IS 2 days ago and haven't tested it out extensively. What I did shoot, I was impressed with. With all the great things everyone said about this lens, I wasn't concerned. After reading this thread, I jumped up and tested from 70-200mm, wide and stopped down and did not come up with any close up shooting softness at all.

 

[rndman]

Here's the one with 135mm f4.0 and MFD

http://www.pbase.com/image/79499612/original

I think that it is soft (or there is lack of contrast) but one has
to compare the shots at 135 and 200 mm

Here are mine (text):

200 mm

http://mfurman.smugmug.com/gallery/2842902#152519312-O-LB

135 mm

http://mfurman.smugmug.com/gallery/2842902#152519487-O-LB

These are typical, average shots for these focal length and MFD
--
Michael

'People are crazy and times are strange, I'm locked in tight, I'm
out of range, I used to care, but things have changed' - Bob Dylan

 

[ed rader]

Michael -- i'll see what i come up with but i got to say you must have really been looking hard to find this "problem" .

ed rader

--



'One often has mixed feelings about relatives, but few people could identify serious problems in their relationships with dogs.'

-- Anonymous

 

[ed rader]

200mm, f4 @ four feet........



100% crop



200mm, f4 @ five feet.......



100% crop



ed rader
--



'One often has mixed feelings about relatives, but few people could identify serious problems in their relationships with dogs.'

-- Anonymous

 

[mfurman]

I think that your lens is not much worse at 200 mm than at 135.
--
Michael

'People are crazy and times are strange, I'm locked in tight, I'm out of range, I used to care, but things have changed' - Bob Dylan

 

[mfurman]

Thank you Ed. I did not have to look at all. This problem came to me in my normal shooting

What do you think yourself, Ed? I did not see how your lens performs at 135 mm or at 200 mm and 7 ft so it is difficult for me to judge (you can see it better on your computer). I think that there is some loss of quality (especially at 4 ft) but I am not sure. If you say that your lens has a similar sharpness (or contrast) at 200 mm and 135 (both at MFD), I would be willing to get another one (I am serious)
--
Michael

'People are crazy and times are strange, I'm locked in tight, I'm out of range, I used to care, but things have changed' - Bob Dylan

 

[Beth]

When measuring distance to subject, does one measure distance from subject to lens front OR to sensor surface? There could be a significant difference...especially with this lens which is a few inches long!!

I'm testing tomorrow. I'll mount a newpaper page to a wall; turn IS off and mount to tripod, then use remote switch. Can't wait to see what I get.

I tested today, but forgot to turn my IS off...OH ICK!

I also want to test my 'drainpipe' 80-200 f2.8 against the 70-200 f4! Can't wait to compare the 200mm on each of these lenses against each other. How the test comes out determines whether or not I sell the 80-200!!

Wish me luck,

Beth

--
Galleries: http://www.pbase.com/cokids/

 

[mfurman]

--
Michael

'People are crazy and times are strange, I'm locked in tight, I'm out of range, I used to care, but things have changed' - Bob Dylan

 

[scrane]

In these shots it seems the image is a lot worse on the top than on the bottom at both focal lengths. Are you sure the focal plane is not tilted in relation to your subject?
Sandy.

I think that it is soft (or there is lack of contrast) but one has
to compare the shots at 135 and 200 mm

Here are mine (text):

200 mm

http://mfurman.smugmug.com/gallery/2842902#152519312-O-LB

135 mm

http://mfurman.smugmug.com/gallery/2842902#152519487-O-LB

These are typical, average shots for these focal length and MFD
--
Michael

'People are crazy and times are strange, I'm locked in tight, I'm
out of range, I used to care, but things have changed' - Bob Dylan

 

[ed rader]

Michael -- here are more at four feet wide open. let me know what you think.

ed rader

70mm



70mm crop



100mm



100mm crop



135mm



135mm crop



165mm



165mm crop



--



'One often has mixed feelings about relatives, but few people could identify serious problems in their relationships with dogs.'

-- Anonymous

 

[rndman]

do you mean it's already worse at 135mm itself?

I think that your lens is not much worse at 200 mm than at 135.
--
Michael

'People are crazy and times are strange, I'm locked in tight, I'm
out of range, I used to care, but things have changed' - Bob Dylan

 

[ed rader]

i think i see some difference but i don't see anything that concerns me.

ed rader

--



'One often has mixed feelings about relatives, but few people could identify serious problems in their relationships with dogs.'

-- Anonymous