AF-100 manual focus issues

[aidan_x]

So are you saying that the Nikon zoom also had the light shift? A little?

I'm not really looking for an ENG lens for the "run and gun" shooting. I AM thinking cinema shooting. I know back in the day, zoom was considered amateur and if you want a transition to a closer shot, you push in. I'm all good with that. But there are some stylistic results that the zoom has with either a smooth, short mechanism transition or a hard hand pull and are used a LOT now-a-days in TV and Cinema. Not that I wanted to use them all the time, I just wanted to have the option and these lens won't give me the option and paying $8k without the lens is not an option. Especially for how little I'll use it.

Have a look at the new movie "Limitless". The effects where you are "ZOOMING" down the street. I don't know if they did that with a zoom or not but I think I can do that with a zoom. But then again... I can't, can I. Not with these lenses and if you're telling me that the light shift is still present in your Nikon... or are you.

My Nikon F Micro 4/3 mount is coming in a few days. I'll see for sure. 100% manual.

 

[NoahK]

Have a look at the new movie "Limitless". The effects where you are "ZOOMING" down the street. I don't know if they did that with a zoom or not but I think I can do that with a zoom. But then again... I can't, can I. Not with these lenses and if you're telling me that the light shift is still present in your Nikon... or are you..

Those shots were not accomplished in-camera- massive amounts of digitally stitching different shots together in post production. Not something you could accomplish with just a zoom lens, AF100 or not.

Noah

 

[NoahK]

Also most consumer zoom lenses change their F-stop when you shift the zoom due to their design. That's why they have two fstop notations on the side. That's what you get with the cheaper lenses. You wouldn't care about that in stills because you only need one frame at a time- but obviously this sucks for video. Which is why I advocate mostly the use of primes for this camera. Notice the 3.5 and 5.6 fstop marking on this lens- that is what I'm referreing to:

If you want no change in aperture throughout a zoom range- i.e. constant aperture- expect to pay double/triple. And again this has absolutely nothing to do with the AF100 and everything to do with the costs of high quality lens optics. That's the league you're in with the AF100. If you don't roll with that- you're using the wrong camera.

Noah

 

[aidan_x]

If your on a lens with f3.5 - f5.6 and you set the lens to f5.6 or above (on the wide), there's nothing for the lens to change to. There's no reason for it to change because you are already at or above what is needed for the long lens. And like I said earlier, the f-stop doesn't change, yet it still gets darker then quickly lighter. lpowell explains the real reason why it does it very well on page 2.

As for the effect on "Limitless". I could be wrong but I think it can be achieved by standing at the end of a long street and zooming as far as you can. Taking notice at where it zooms to and then walking to that point and starting at a wide again and shooting another zoom all the way. Repeating this for as long as you want.
Then later in After Effect, on shot 1, you cut a hole at the end of the street and as the zoom enlarges, you enlarge the "hole" (rotoscope). Then, at the beginning of shot 1, you place "shot 2" in the hole and enlarge it with the zoom until it gets full screen and then shot 2 video starts. You repeat this as many times as you have shots.

Like I said, I'm probably wrong but if you watch the scene, you CAN see it go from wide angle to long lens repeatedly and there IS motion (video of people walking while the lens is ... zooming)

I actually wanted to give it a try just to see how close I can get in the manor I explained.