photomarche

<p>Thank you all for the contribution. In addition to front focus issues, I randomly had blur shot at infinite under day light.... I eventually lost confidence in the product (this copy of the product) and returned it.<br>

Thanks again</p>

<p> </p>

<p>Hi,<br>

I just bought the sigma art 35mm f1.4 ART to use on D800, and noticed a front focus issue.<br>

I tested it at f1.4 on tripod.</p>

<p><br /> After fine tuning the focus for this lenses to +20, it now looks ok. <br>

The other lenses I have are all nikon and they focus without need to fine tune. <br>

The camera itself was serviced few weeks ago and had the AF system check thoroughly, no issues were found.</p>

<p>I feel unconfortable with fine tuning the lens to this amount, do you find +20 an accetable value or would you return the lens insetad?</p>

<p>Thanks</p>

<p>Regards,</p>

<p>Francesco</p>

<p>I am looking for this lens here in the UK, I cannot find it anywhere....<br>

I will try too at Calumet.</p>

<p>Thanks William for the comprehensive answer, I like to learn about other systems.</p>

<p>Regards,</p>

<p> </p>

<p>Hi,<br>

I am writing in behalf of a friend of mine who want to upgrade from Canon EOS 400D to 600D. As I am not a canon user, I am not very familiar with the EOS system and I am asking for help... I would like know if the 600D auto-iso mode works in both manual mode and automatic mode. The idea is to use the Canon 600D in M mode and have the ISO set to auto. This is not possible on the 400D as the auto-iso is not supported in M mode.</p>

<p>The other question is if the EOS 400D kit lenses, the Canon EF-S 18-55mm, can be used on the EOS 600D.<br>

<br />Any help is appreciated. Thanks in advance.<br>

Regards</p>

<p> </p>

<p>Thanks Shun for your answer, I now think the camera is ok and I will replace the cable.</p>

<p>All,</p>

<p>I was shooting outdoor with the D800 in live view few days ago.</p>

<p>The release cable stopped working at some point, and I realized that it had one of the inner cables broken. I therefore switch to the auto-timer mode. However the camera would stop displaying the shot taken on the screen after each shot, despite the "Image Review" option on the menu set to On. No feedback at all.</p>

<p>I manually pressed the "Lv" button however the camera would not switch to and from the live view mode. The LV screen remained off.</p>

<p>I switched off the camera, changed the battery, removed and inserted again he memory card but nothing improved. I finally removed the release cable from the camera and switched off/on again. At this point, everything got back to normal behaviour (LV mode and image review). I have been using the camera since without issues, also trying different release cables.</p>

<p>It looks like the issue is related to the cable release being broken and still connected to the camera... who knows!</p>

<p>I am annoyed about what happened, I am not sure if I should take the camera to the Nikon center because the problem is not re-occurring. What are they going to fix?</p>

<p>Did you have a similar experience? somehow, I did not expect to have this problem on a pro-camera.</p>

<p>Thanks</p>

<p>D7000? this would also allow you to use D lenses.</p>

<p>I would also suggest the 20mm f/2.8 D<br>

Light and compact, here is the review from DxOMark<br>

http://www.dxomark.com/index.php/Lenses/Camera-Lens-Database/Nikon/Nikon-AF-Nikkor-20mm-F28D/%28camera%29/792/%28cameraname%29/NIKON-D800</p>

<p>Glen,<br>

Although the D600 has an improved AF system and 39 focus points should be enough for most situations, their distribution in the sensor cover a very small area at the center. On your D7000 focus points are much better distributed. Considering this, I do not see going from D7000 to D600 an upgrade.<br>

If you have chance to try a D600, make sure you are comfortable with this limitation. As stated above the D800, D700 and new D7100 have better AF system.</p>

<p> </p>

<p>N S,<br>

thanks, I too have noticed in Elliot's examples that f2.8 looks softer.<br>

The 24-70 is my first and only pro grade glass and maybe I have very high expectations. Nevertheless I will do more testing following your advices in details.<br>

Thank you all for taking your time to answer.</p>

<p> </p>

<p>Dan,<br /><br />I focused using live view autofocus. The focus point is the statue. I noticed the difference in sharpness looking into the fine details on the statue body. Other people in the house noticed this difference as well looking into the monitor. I performed other test all 70mm at f2.8, using also a different body ( the D7000) and there is a difference is sharpness between f2.8 and the same images stepped down 1 or 2 stops. If this behavior is expected when shooting wide open, as Peter post seems to suggest, I am fine with that.<br>

Gary, thanks for the advice on the ruler. <br /><br /><br /></p>

<p>Yes, I put the links on the previous page:<br /><br /><br />http://www.photo.net/photo/17020593<br />http://www.photo.net/photo/17020592<br /><br /><br>

link to both images side by side<br>

http://www.photo.net/photo/17024335&size=lg</p>

<p> </p><div></div>

<p>My comments above, apply to the D7000 as well. Noticed a bit of softness at f2.8 at 70mm (distance from the subject 80cm)</p>

<p>I am focusing with Live view, and shots are taken with the same settings (ISO 100, tripod, cable, MUP, raw), just different aperture.<br>

Did more testing at 70mm on the D800. From observation, it still looks softer at f2.8 at any distance, however it is more visible on the short distance (I tried 2m away). Increasing sharpness in LR (for example from 25 to 50) helps to improve the result a lot. Not a problem for landscape as I would step down, but I hoping to use this lenses for portrait as well. <br>

@N S, thanks for the advice, I will try AF tuning as well.<br>

Regards</p>

<p> </p>

<p>photos uploaded:<br>

http://www.photo.net/photo/17020593<br>

http://www.photo.net/photo/17020592</p>

<p> </p>

<p>Hi,<br>

Here are two shots taken with D800 and 24-70mm, both at 70mm, AF-S , live view focus.<br>

I used tripod shutter cable and MUP, they are taken a few seconds away from each other under the same light condition.<br>

From the crops, I noticed that the image taken at f2.8 is a slightly softer.<br>

According to photozone (http://www.photozone.de/nikon_ff/456-nikkor_afs_2470_28_ff?start=1), the resolution at 2.8 70mm drop at the borders, so no surprise there.<br>

However, even in the center, the image looks a bit software compared to the one taken at f4 (raw file comparison)</p>

<p>24-70mm at f2.8<br>

<img src="C:\Users\BEBE\Pictures\D800\test24_70@f2.8" alt="" /></p>

<p>24-70mm at f4<br>

<img src="C:\Users\BEBE\Pictures\D800\test24_70@f4" alt="" /></p>

<p>I did other tests and all images taken at 70mm f.28 looks a bit soft.<br>

I usually use this lenses stepped down for landscapes, it is very sharp.<br>

Could it be a focusing issues?</p>

<p>What is your experience with this zoom lenses?<br>

Thanks</p>

<p> </p>

<p>Thank you for all your comments.<br>

I thought as well it could be the filter,or maybe the way it was positioned (I used Hitech 100mm with Lee filter holder),but I found other points of view very helpful as well. I will have the opportunity to go back to the same location and practice again with and without filter.</p>

<p>Hi,<br /> I took this shot at sunset againt the sun, using a 0.6 reverse grad filter</p>

<p><a href="C:\Users\BEBE\Pictures\temp\_DSC6870_flr"><img src="C:\Users\BEBE\Pictures\temp\_DSC6870_flr" alt="" /></a></p>

<p>70mm<br /> f14<br /> 0.8 sec<br /> As you can see it looks like there are 2 suns... I do not know what I did wrong, how can I prevent flare in the future?<br /> Thanks</p>

<p>(see attachment)</p>

<p>35mm f1.8 DX, it is a beauty,... sharp and fast (my preferred choice for street ph and people)<br>

50mm f1.8 D or G ... for portrait<br>

16-85mm DX for landscapes, sharper than the kit lenses<br>

70-300mm VR f4.5 - f5.6 for landscapes and wildlife</p>

<p>I would keep an eye on the sensor dust issue before jumping on the "buy" button. It is not just few users complaining and nikon might fix this in the next load of camera.<br>

This problem happen. I bought a d7000 last year and the mirror was spraying oil on the sensor. I was told this was a problem with early models, and a nikon dealer replaced the faulty part with no charges. Early releases of the Canon 5D Mark III had a light leak on the sensor. Canon has now fixed the problem. </p>

<p> </p>