I got this Sigma 28mm 1.8 (aspherical) for cheap and i wonder how much edge in terms of AF speed, reliability and image quality am i losing out on compared to the Nikon AF-S 28mm 1.8 G, while shooting with a F100? Can this even be determined?
I recently put a book together of photos taken twenty years ago on a 300mm Sigma at minimum focal distance of a few feet. Objectively it's a bad lens. Subjectively I love those shots, especially on slow slide film.It makes sense, when film was king all we wanted was perfect, sharp, distortion free photos. Now when a lot of us shoot film we want character and oddball stuff in our photos. I have an MC Focal 135 2.8 that was and is junk. However I prize it for the weird bokeh and odd distortion.
For example the newest "G" Nikon AF lenses have mostly very good optical designs, at the expense of being UGLY AS HELL, and unusable on most analog cameras because of not having an aperture ring.
In the G-series era an example of an underperforming lens is the 24-120 "VR" "G" lens.
This may be sacrilege this site...
35mm is a small format, it's not an high-resolution format for the most part.
Not sacrilege just very gross generalization.
Generalization has its uses, notice how I used an addendum 'For The Most Part.' What this does is absolves me from adding every exception to the rule, thus saving me time and energy.
I don't remember any pro's back when film was king shooting 35mm unless it was street or photojournalism.
Nikon lenses always better than off brand?
Find me an example of 135 that can out resolve its counterpart on a larger high resolution format. For example; slow slide film, say something way down around 25 ISO would pale if it were put next to the same film shot in medium format or large format.
I don't remember any pro's back when film was king shooting 35mm unless it was street or photojournalism.
You should keep in mind that there are many medium-format and large format shooters on APUG and probably many of them are on this very same thread, because one does not just limit to one format.
As for your claim, the opposite is correct -- usually the smaller the format, the higher-resolving is the lens, because:
1. The smaller format requires a higher resolution lens to keep quality reasonable. The extreme of this is the COMPLAN lens on the classic Minox subminiature cameras, which are supposedly some of the highest resolving lenses ever put on a production camera.
2. Since the smaller format lens needs a much smaller coverage on the image plane, it can be more easily made into a higher resolving lens.
There is a page of tests of large format and medium format lenses out there on the web, and only the very best medium format lenses (i.e. the normal lens for the Mamiya 7) can hit levels that surpass the very best 35mm lenses. But also because they are lenses of small aperture (i.e. F/4.0) -- much easier to optimize than a normal lens of f1.4 or f2.0 aperture.
The unquestionably and dramatically higher resolution of larger formats is because the larger negative more than compensates for the lens resolution. That's why a large format image will look stunning even if using a 3-element triplet. And if the larger format lens is a premium lens then the resolution is out of this world.
I used to swear by the 6x7 negatives of the RB67, which are stunning indeed, but last time i shot 35mm carefully with Delta 100 and my best lenses, the results were very good. Still not like medium format, but very good.
Finally, you can't compare a "135mm lens on 35mm format" with a "135mm lens on large format" because the angle of view of both lenses is dramatically different.
Back when film was king, I remember shooting medium and large format color and B&W film for portraits and weddings because the 35mm negatives were too small for retouching. I also remember shooting 35mm transparencies because that is what my customers needed for their slide presentations.
...what hideous distortion w/the Nikon!
Linear distortion-"moustache" effect in spades.What type of hideous distortions?
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