Just bought a copy of this lens for Canon. Hannu_E_K edited this topic 99 months ago. Go back and check what you did, if there was any differences or if you did wrong somewhere.ĭo all Samyang 14mm lenses need this calibration?Not likely to be so, no. To begin with, if the description does not match your gear - then you're on your own. When you try DIY solutions to problems you need to be very attentive to details. Now, when my lens is set at infinity, it is only focusing at around 40cm, and I can't get my lens to focus beyond 40cm! Can anyone please help? I have followed the procedure and I messed up my lens somehow. Any tips? The focus scale-ring cannot be pushed against the camera body because the ring behind it is the same size. Hello on my version of this lens the focus scale-ring cannot be changed like in this great movie. I just got mine - do all Samyang 14mm lenses need this calibration? Is it a possibility that it might be fine right out of the box? Thanks in advance for your inputs and guidance! I agree that it's a great lens though, especially since this problem is easy to fix. I use the lens wide open for astrophotography so it's important to have infinity focus set correctly. I was able to fix it in about 15 minutes following your video. My lens' distance markings have been off ever since I got it last year. I will have to be even more careful when using this nice "plastic" lens. I then wonder if I have not forced on the focus ring when switching lenses. I did the fixing process, and I think I figured out what happened.Īnd the lens mount is "sticky" when fitting or removing it on my camera.Īlso, there is not much place for the fingers between the focus and the aperture rings. I am going to set the focus as described.īut if it changed once, I guess it may change again :-( ? I never dropped it, I always took extreme care of it, and used it very few times. I am almost sure my lens was OK with my Canon 5D II, then it suddenly changed. Thank you :-)īut was the setting wrong when you got the lens? Or, did it change while using it? OK, many Samyang 14mm lens have a wrong focus setting, and it is easy to fix. Hi, I just discovered this interesting group. Hannu_E_K edited this topic 106 months ago. Now, 3.5 meters - 12 feet at f/2.8 is what you need on a DX / APS-C camera. This will be the case all the way until optically perfect lenses can be made for cheap enough. Reality is always what you have to put up with, theoretical optical formulas calculate based on optically perfect lenses - no aberrations. I think is better check DOF with live view always it's possible. It says with a 14mm lens and f4 you have acceptable sharpness on infinity when focu to 3 meters (9.84 feet), but my experience calibrating Samyang 14mm is focus to 3 meters, you get infinity out of focus. I have to say that DOF calculator is wrong with Samyang 14mm. Example on a FullFrame sensor at f/5.6 and a focus distance of 3.84 feet you get focus to infinity. You're right, MFD only varies for ten centimeters. Thing is: I now have infinity dead on but this is before infinity for f/2.8, but it is hardly noticeable I can't really say that I notice a closer MFD, this can't be more than some millimeter anyway. It is just more convenient not to have a big dead zone beyond infinity. It is good enough, I rarely use the distance scale, I either focus with the AF assist of my Nikon or with live-view. What do you mean? Do you have a problem after correction? I think I will calibrate it for the f/5.6 setting, I can't imagine a situation where I want to focus to infinity wide open.įorgot to hit Post, did the correction (took 10') and now the focus scale is dead on, also on the other markings At f/2.8 infinity is halfway between 2m and infinity mark, while at f/5.6, where I use the lens most of the time, infinity lies halfway between 1m and 2m mark! I noticed that my 14mm has a huge residual aberration. Very clear description, thanks for sharing. Originally posted at 5:11AM, 15 January 2013 PDTĮMaDeLoC edited this topic 86 months ago.
Forget to mark the infinity focus, get the real infinity focus and full scale focus distance. It's a spanish video with english subtitles with step-by-step instructions.
It's a problem to focus at infinity in one move, but also you can't focus at near distance like 1 feet.īut this video teach you how to fix this issue easily in less of one hour. The infinity focus is not at infinity mark on the focus ring. Sharp image and ultra wide-angle lens.īut it has a common issue.