BrunoCH reacted to Geoff CB in Nikon 2.8G Series Zooms
Nikon 16-35 F4, 24-70 2.8, 70-200 2.8G (First Version)
These lenses offer a great range and color with a matched look. For used prices they are a great way to cover a huge zoom range with full frame coverage.
Do NOT go for the 17-35 2.8, overpriced with ugly distortion and bokeh.
Nikon 24-70 2.8G on Sony F3
BrunoCH got a reaction from IronFilm in Inspecting the Fuji GFX 100, and having a cup of tea
Not possible : Apple Prores raw is a raw pattern bayer image. GFX is a normal bayer sensor , not the case of XT serie with an Xtrans sensor.
BrunoCH reacted to heart0less in A tiny 25/1.8 CCTV lens vs speedboosted Nikkor 35/1.8.
Another extensive post coming from me - brace yourselves!
Long story short: I tried to minimize my 35mm eqv. setup and see what potential drawbacks would this bring.
Left side: newly acquired Newyi 25/1.8 CCTV C-mount lens bought for astonishing 23$.
Right side: Zhongyi Lens Turbo II + Nikkor 35/1.8 G (officialy it's a DX lens [meant for Nikon APS-C cameras], but it happens to cover FF quite nicely).
Goliath vs David:
Operation-wise, it's difficult to pick a clear winner.
Newyi, being a CCTV lens, is so tiny that it's rather tricky to wield, even with my small fingers. Aperture ring is stepless and smooth, whereas focus ring is a bit stiff near infinity.
Can't say a bad word about focus throw or focus zones overlaying one another - those are all good and allow to precisely nail the focus.
Nikkor, on the other hand, isn't the most intuitive lens and is rather quirky to operate manually. There are no focus marks and the focus ring has little steps that can be felt while fine tuning.
There is no aperture ring and the only way I can affect the aperture is via an AI - EOS adapter with built-in aperture lever.
Having said that, Nikkor simply feels better in my hands. It may be bigger, heavier and not meant for manual use, but it is what it is.
Newyi is advertised as a f/1.8 lens, yet it doesn't gather as much light as it really should.
The same scene, shot in the same conditions, required a shutter speed of 1/60 when I used Newyi wide open, compared to a shutter speed of 1/105 when I used Nikkor (via dumb adapter, not a speedbooster).
Speedboosted Nikkor gave me a reading of 1/160.
That's a 2/3 EV of difference, which makes Newyi rather a T/2.2 (if not less) lens, not a T/1.8 one.
Speedboosted Nikkor is almost a T/1.4 beast.
Field of view between those two is almost identical.
Nikkor has some serious barrel distortion, but it's due to it being a DX lens.
Sharpness and contrast:
Wide open Newyi is not only tack sharp in the center, beating the Nikkor easily, but also free of any noticeable aberrations/fringing.
Unfortunately, it's less contrasty and introduces some ugly beige/red tint to the shadows.
Some 100% crops.
Those are my thoughts after owning the Newyi for 3 hours.
I really wanted it to replace its bigger competitor, but to me contrast, color rendering and ability to gather more light is more important than sharpness and portability.
Nonetheless, the fairy tale has a happy ending and Newyi managed to find a new host - Sony NEX-5.
I hope my sister enjoys it, lol.
Here is a photo taken with it on a NEX-5:
And a 100% crop:
BrunoCH got a reaction from heart0less in The Mystery of the Lost Parfocality
I have the same problem with my nikkor zoom 25-50. Back focus need to be very precise and it can move just with a change in temperature. This is why there is a back focus adjustment ring on the zoom fujinon MK.
This Ebay seller
sells M42 adapter to Fuji X with a back focus adjustment. I have exchanged messages with him and he will see if he can do something for a Nikon to Fuji X adapter. I’m waiting !
BrunoCH reacted to Jay60p in The Mystery of the Lost Parfocality
Here is a Nikkor AF 28-85mm f/3.5-4.5 SLR zoom lens mounted on my X-T3,
with the basic Fotodiox adapter for Nikon F.
The lens focus is parfocal from 28mm to 85mm, with a smooth zoom ring, great for video zooms:
So I was surprised to find weeks later that it suddenly was not
holding its focus, it was focusing farther at wide angle (??)
At 85mm, focused manually (a screen grab cropped into the video):
Then zoomed out to 28mm, the focus shifted behind the subject:
Eventually I realized that I was using a different Fotodiox Nikon F adapter this time,
and the only difference was an aperture control ring built in for G lenses:
I compared the thickness of the two adapters with a small C clamp.
The G adapter was a hair shorter than the basic adapter,
and the G adapter had the lens focus going too far past infinity.
So I decided to extend the G adapter’s length a slight bit.
I removed the back of the adapter by removing four screws,
and I added a thin layer of tape to extend the adapter’s overall length:
Finding the right thickness of tape was trial and error.
Thin cardboard, too thick. Duct tape, too thick. Black masking tape worked.
Now after zooming out it is back in focus:
So a mounting error of the thickness of masking tape threw off the zoom’s parfocality!
How thick was this tape? I have an old caliper from my grandfather, and it measures
in 1/1,000 inch increments. (But not wide enough to measure the Nikon adapters):
The masking tape is seven thousandths of an inch thick. That's about a sixth of a millimeter.
The moral of the story: if your vintage zoom lens adapted to your mirrorless camera
appears not parfocal for video, try another brand of adapter, especially if it has infinity focus
adjustments. Apparently all it takes is a few thousandths of an inch to throw it off.
BrunoCH got a reaction from Zach Goodwin2 in Looking For Cheap Alternatives
Very good idea. It was with Nikon AI or AIS lenses on my Canon 550D (T2i) that I started shooting my short films in 2011. You get beautiful pictures.
Here is a site to identify all the nikon lenses that exist.
BrunoCH reacted to kye in Looking For Cheap Alternatives
Pick two or three of those focal lengths and buy quality lenses instead of trying to buy 9 cheap and poor quality ones.
Then go film something.
Even better yet, buy one really nice lens, then go film things and never look back and never take it off your camera.
BrunoCH got a reaction from heart0less in Nikkor zoom 25-50mm f4
When looking for a zoom for my XT3, I discovered the existence of a 25-50mm nikkor AI. Originally, it was a wide zoom for 24x36mm which went from the standard focal to a wide angle. On the XT3’ sensor, it is a zoom very well centered on the standard focal, a bit like an 18-55 but with a narrower range.
I found a copy in very good condition on Ebay for 105 $ + 24 $ shipping.
I received it yesterday morning and I did a few quick tests in the afternoon.
Optical quality and build contruction
All manual with 3 rings: aperture, zoom, focus.
Maximum aperture at F4 (too soft, it must be opened at 5.6 at least to have the full quality of this lens)
Not Parfocal. The focus moves when you change the focal length.
I chose the AI version because focus throw AI version 130° vs 75° AIS version.
If you want to view some boring crapy shots.