Jump to content

Sony a7ii with Canon FDn 500mm f/4.5L focus issue


Black
 Share

Recommended Posts

Hello there, i am a new member of this forum. Just wondering if anyone can give me a suggestion. I tested my Sony a7ii with MF Canon FDn 500mm f/4.5 L lens, mounted on a CF tripod (Sirui N-2204), steady shot set at 500mm then shot on and off both mode, shutter speed around 1/800 to 1/1500 but can not get a sharp image. I even can see on the magnified LCD (without touching anything) the picture is not stable, kind of vibrating. Is it camera problem or Tripod? Please help me.Thank you.

Link to post
Share on other sites

`    

     

    

You're using a minimal shutter speed and your rig is vibrating.  

    

I have no idea what the model name on your tripod means but 

mine is leftover from my 4x5 and 8x10 cameras and goes nine 

feet tall ... IOW, the legs and head are massive. And I can see 

vibration when using the MF magnifier with long lenses or long 

extensions. But I use electronic 1st curtain shutter and acoarst

wireless remote and have no sharpness issues.  

   

If you insist on using such shutter speeds, you also ought to 

support the camera-plus-lens combination both at the camera

and at the lens. I use one hard connection [body or lens collar] 

and one padded "gravity rest" without a hard connection. Two 

hard connections would vibrate worse. Rigidity invites vibration. 

Friction damps vibration. The padded "gravity rest" avoids too 

rigid a setup.  

   

It's almost certain that your tripod is lighter than what I use, so 

if you're taking fewer precautions than I do, you'll have trouble.  

   

  

`

Link to post
Share on other sites

  • 8 months later...

It is my experience with Canon's 300mm/4 & 400mm/4 DO, that IBIS is not as efficient beyond 300mm+ focal lengths as lens based IS. I invariably prefer to use IS. 

Also, on a firm and stable platform (tripod) IBIS is supposed to be off. 

That's a fine lens you have but could be it requires focus adjustment to match your body or some element inside had moved out of alignment over time.

 

Link to post
Share on other sites

Create an account or sign in to comment

You need to be a member in order to leave a comment

Create an account

Sign up for a new account in our community. It's easy!

Register a new account

Sign in

Already have an account? Sign in here.

Sign In Now
 Share

  • Posts

    • Thanks for the very useful information. The 16-55 tempts me, I can live with the absence of stabilisation, what holds me is the price tag. As always, there is not such a thing like a free lunch in life. The Sony gives performance at a reasonable size but with no stabilisation and higher price tag, the Zeiss is compact, stabilised and reasonably priced but lower performed, while the Tamron provides performance at very good price and stabilisation at the expense of bulkiness. 😀 All in all, I think I will give a try to the Tamron, once I have taken in my hands. Here are two cutouts taken close to the center of the picture. The sharper one is the kit zoom, the other is the 18-105 mm, at approximately the same lenght around 40 mm at /f 8. The difference is impressive and more impressive for me is that all the lenses in the shop had the same behaviour on two different cameras. At this point looks like a whole batch and not just a lens.  

      Welcome, dear visitor! As registered member you'd see an image here…

      Simply register for free here – We are always happy to welcome new members!

    • That's a pity and certainly doesn't match with my experience with the 18-105: mine is definately on par with the 16-50 kit lens (which on its own was as decent as I could expect from such a cheap lens). Sure, dont expect sharp corners especially wide open, but in the center my 18-105 left little to be desired across most of the zoom range. The 16-55 does beat it in every regard except zoom range though. The Tamron 17-70 trades blows with the 16-55 and might be the better choice in some cases. I went for the 16-55 because of the smaller size (I also found the 18-105 too bulky most of the time) and slightly wider FoV. My camera has a stabilized sensor so stabilized optics was no requirement for me. As you noted, I kept the 18-105 on my old A6000 for the occasional video project.
    • Thanks! The 18-105 mm /f4 was PERFECT lens for my needs but a HUGE disappointed. I bought it with the camera, then I brought it with me on a trip. To my disappointed, all pictures came out slightly blurred, like the lens was slightly out of focus. Stepping down was not solving the issue. The kit lens was definitely better, to my surprise. Thinking that I got a lemon, I went back to the shop where I bought It (luckily, I has bought both the camera and the lens in a brick and mortar store). We tested the lens on another camera and it was the same. Then we tested other copies of the same lens that the store had in stock and all showed the same lack if sharpness. All pictures slightly out of focus. In the end I returned the lens and used the money to buy other equipment. I must admit that it was a perfect lens for video but it is not what I use my camera for. Actually this was confirmed by the shop owner, most buyers of the 18-105 mm are interested in its video capabilities. I will have a look at the Tamron, the Sony 16-55 is almost double the price, at least here, so I will keep it out of the picture, at least for the time being. The Sigma also looks as an interesting option.  
  • Topics

×
×
  • Create New...