Jump to content

Recommended Posts

Advertisement (gone after registration)

I've been shooting with Sigma 100-400 for couple of months.

As others have mentioned I find that this lens punches way above its price point in terms of IQ. Also due to its compact size and weight I find myself bringing this lens along far more often than I've ever done with a lens with 400mm reach.

Today I decided to test the lens to try to answer a couple of questions I had about the lens:

1. I was finding some inconsistency in sharpness even when shooting on tripod. There's been speculation in various posts that this could be due to mechanical shutter. I wanted to test this out. 

2. I also have the TC-1411 teleconverter, but have not been making much use as I was uncertain about its impact on image quality. I've seen several reviews that report little to no IQ degradation from its use so decided to test it out.

To answer the first question I took 3 exposures using mechanical shutter and compared the results. I found wide variation in the results. I repeated the test 3 times with the same wide variation. The test was conducted on a tripod (top of the line Really Right Stuff) at 100 ISO with 12 second shutter delay shooting from indoors ( no wind or other impacts).

I then repeated the test several times with electronic shutter. While there was some variability between shots the differences were minor.

Based on this relatively simple test I'm satisfied that the speculation that mechanical shutter impacts image quality in a noticeable way is in fact correct. I will be using electronic shutter with this lens from now on. 

In order to answer the second question I took a series of 3 images at 400mm and then at 560mm focusing on a group of junction boxes on top of a building ( distance about 230 meters or 750 ft. I chose this subject because the boxes have numbers on them which helped with subsequent comparison between images. Also the texture on the wall surrounding the junction boxes offered a further reference point. 

From each set of images taken at 400m and 560mm I selected the best one (differences were minor based on use of electronic shutter). I then compared the image taken at 560mm with 200% magnification with the one taken at 400mm with 300% magnification. I used these settings as I figured it would "roughly" equalize the result between using lens with teleconverter versus doing a more aggressive (equivalent) crop in post. 

All images were shot at 100 ISO in the case of 400mm F6.3  & 1/125 and in case of 560mm at F9.0 & 1/60 

Below I've attached the comparison between the two. I will share which is which in subsequent post but thought I'd share and get some initial reaction to the comparative difference. 

Edited by NicholasT
Link to post
Share on other sites

Greeting Nicholas,

Thanks for your work on this. I have an L 90-280 but the Sigma lens you're testing interests me for wildlife photography. I have an SL (601) and an SL2-S.  Unless I've missed it somewhere please can you let us know which camera you have used? 

Your advice about the difference between the mechanical or electronic shutter is really useful. 

Stay safe and well,

Graeme

 

Link to post
Share on other sites
13 minutes ago, graeme_clarke said:

Greeting Nicholas,

Thanks for your work on this. I have an L 90-280 but the Sigma lens you're testing interests me for wildlife photography. I have an SL (601) and an SL2-S.  Unless I've missed it somewhere please can you let us know which camera you have used? 

Your advice about the difference between the mechanical or electronic shutter is really useful. 

Stay safe and well,

Graeme

 

Hi Graeme,

Re camera I used my SL-2. I've previously owned the SL (601) and will soon be receiving SL-2-S which I plan to use for travel, low light shooting and as backup body.

I believe the lens findings re mechanical vs electronic shutter as well as TC-1411 test would apply to all 3 SL camera models particularly considering the fact that all images were taken at ISO 100.

Glad that the test findings were helpful.

Cheers,

Nicholas

Link to post
Share on other sites
29 minutes ago, jaapv said:

The difference between electronic shutter and mechanical shutter is even more pronounced on the CL.

I believe your original mention of the electronic shutter as the likely culprit is what led me to this test. Thanks for sharing that info!

Edited by NicholasT
Link to post
Share on other sites
3 hours ago, NicholasT said:

 

I'll spare everyone the suspense.

The first image being the better of the two images was taken without teleconverter at 400mm with 300% magnification!

Based on this test it would appear that at least with Sigma 100-400 with SL2's higher resolution sensor, cropping in post is the better option.

In response to Graeme's earlier question I may stand corrected in that its possible that teleconverter comparison would produce a different result with SL (601) or SL2-S due to camera's lower resolution. Mechanical shutter impact on image quality may also be somewhat less pronounced, although the difference was so noticeable on SL2 that I would expect it to be visible at lower resolution as well.

 

Edited by NicholasT
Link to post
Share on other sites
  • 3 months later...

I too have found the electronic shutter produces better results. I was initially very disappointed  with the lens and was considering returning it. However, I am now much happier with the colour rendition and images are much sharper using first Lightroom and then the few things Photolab will do for the lens - not much but it seems to help. I’m using an SL2s.

Link to post
Share on other sites

Join the conversation

You can post now and register later. If you have an account, sign in now to post with your account.
Note: Your post will require moderator approval before it will be visible.

Guest
Reply to this topic...

×   Pasted as rich text.   Paste as plain text instead

  Only 75 emoji are allowed.

×   Your link has been automatically embedded.   Display as a link instead

×   Your previous content has been restored.   Clear editor

×   You cannot paste images directly. Upload or insert images from URL.

Loading...
  • Recently Browsing   0 members

    No registered users viewing this page.

  • Similar Content

    • By Sheepdog1512
      After shooting for a few minutes (or after a certain number of shots), the EVF displays a message that “burst shooting or recording in 4K is not available” (or something similar to that). Even though I am using a fresh battery, completely charged, the battery level quickly goes to the 50-75% range. I have the camera (SL2) set to shoot in high burst mode and I may get about 50 or so shots before this message is displayed. If you can only get 50 or so shots on high burst mode, this makes the battery/camera very limited if you need these high burst rates. Since I am new to Leica, I guess I have something set wrong. Any help is greatly appreciated.
    • By mcmarcy
      Ich ärgere mich jedes mal darüber, dass ich beim Hineinzoomen in ein gerade geschossenes Foto immer irgendwo im Bild lande und nicht an der Stelle wo der Fokus zuvor beim Fotografieren festgelegt wurde. Was soll diese Sucherei? Wenn ich bei einem Porträt auf die Augen fokussiere, will ich bei der Bildkontrolle nicht irgendwo am Hals etc. landen, sondern genau auf den Augen. Bei anderen Marken wie z.B. Nikon klappt das immer! Ich habe vor Monaten schon einmal einen Verbesserungsvorschlag an Leica gesendet, der aber bisher nicht erhört wurde. Stört das niemanden von euch? Oder habe ich eine Funktion an meiner SL2 übersehen?
    • By BlackDoc
      Some impressions from today, as i was asked to take some pics with the new Panasonic 24/50/85 lenses (all of them at min f1.8). I am testing not like others by taking pics from a wall, the lenses  have to proof themselves by working with them.
      Of course the pics are postprcessed as all of my pics but in short conclusion you will get good working lenses with good results. There might be some differences in pixlpeeping in high end prints (and on screen at 100% view) but this is not the normal view. 
      In this setting from todays morning i went into the cathedral, unfortunately i did not realize the beginning of the church service and it was too late to leave the tomb of henry the Lion and his wife Mathilde  when the bells started to ring....
       
      24mm:

      Hello guest! Please register or sign in to view the hidden content. Hallo Gast! Du willst die Bilder sehen? Einfach registrieren oder anmelden!  
       
    • By intak
      Hi, I shoot a lot of commercials.
      I bought sl2 this time.
      An incident occurred during the first commercial shoot using sl2.
      The picture came in well on the capturer one, and there was no problem taking it.
      Then, at some point, the camera went completely out of order.
      Touch screens are not available and power buttons are not available.
      If a stop occurs, the battery must be forcibly removed.
      And when we film again, things go well, and at some point, af stutters.
      It stops again.
      This phenomenon continued to occur on the set.

      Usage environment - macbook pro, capturer one, ether cable (usb C), sd card not used

      I'll connect the link. I would appreciate it if you could check and tell me the cause.

      Laika only says it's an SD card problem even if there's no problem at all.
      There's no problem, so there's nothing I can do for you.
      It's so frustrating.
      https://youtu.be/A8ubSdv87nY
      SL2 All functions stopped.
       
       
       
    • By silverbacklabs
      Hi there,
      I am attempting to repair the battery terminal for the light meter on my SL2, which corroded and snapped off some years ago. I have seen a repair video for the same issue on an SL model on YouTube  and it certainly looks achievable: https://www.youtube.com/watch?v=JXSjrAUj0EQ
      I am having trouble removing the bottom casing though. After removing the 2 screws and either end of the body, it's clear it is still fastened in the middle, however there is no drive hole to unscrew inside the tripod mount. It's possible that it has been stripped off if it's soft aluminium. I have attempted with a Robertson bits and Hex bits and there is nothing in there to grip - but I can also see that there is nothing to grip....
      Is it different between the SL and SL2... or if it has been stripped, is there any other way to remove the screw/cover?
      Thanks in advance...
       

      Hello guest! Please register or sign in to view the hidden content. Hallo Gast! Du willst die Bilder sehen? Einfach registrieren oder anmelden!
×
×
  • Create New...