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Canon EF 50mm F/1.8 II STM + Hoya Intensifier

Cheaper than many fully-manual budget lenses, the Canon EF 50mm F/1.8 II STM (and its variants) is fairly ubiquitous. Below are some evaluation images I shot using this lens on a Canon EOS 6D. A Hoya Intensifier filter was also used to help lessen the light pollution effects from the red zone I live in.

Corner/Edge Performance

The following mosaics were made from 100% crops using light frames shot on a Canon EOS 6D body (unmodified) at ISO1600 from a red zone. Exposure times started at 3.2 seconds at F/1.8, 4 seconds at F/2.0, and then doubled with each successive aperture stop after that. A Hoya Intensifier LPS filter was used to reduce the effects of light pollution. Use the gallery below to cycle through light frames gathered at different apertures (click to view full-sized images).

Vignetting

Full-frame users may be disappointed by the vignetting performance of this lens. Vignetting remains strong even through f/2.8 and doesn’t much better unil f/4.0. APS-C users will be much happier, with decent vignetting around f/2.0 and becoming very good by f/2.8.

 

Sample Images

Figure 1: Taurus and the Pleiades, Canon EOS 70D, 80x180sec stack, ISO1600, f/3.2, Prints Available. Read more about how this image was created here.

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Rokinon 85mm F/1.4 AS IF UMC + Hoya Intensifier

Falling well within the “budget lens” category is the Rokinon 85mm F/1.4 AS IF UMC lens ($299 new at the time of this writing). Below are some evaluation images I shot using this lens on a Canon EOS 6D. A Hoya Intensifier filter was also used to help lessen the light pollution effects of the red zone I live in.

Corner/Edge Performance

The following mosaics were made from 100% crops using light frames shot on a Canon EOS 6D body (unmodified) at ISO1600 from a red zone. Exposure times started at 2 seconds at F/1.4 and doubled with each successive aperture stop. A Hoya Intensifier LPS filter was used to reduce the effects of light pollution. Use the gallery below to cycle through light frames gathered at different apertures (click to view full-sized images).

The Rokinon 85mm F/1.4 AS IF USM lens exhibits reasonably good corner/edge performance at f/2.8 and above. Coma is still an issue at F/2.8 in the Full-Frame edges, and astigmatism is always present in the far Full-Frame corners. Chromatic aberration is pretty harsh until F/4.0 and mostly gone by F/5.6.  It’s probably best if this lens is stopped down to F/4.0, and perhaps better on an APS-C body.

Vignetting

Vignetting is very strong at F/1.4 but improves at F/2.0 and is much better at F/2.8 and higher. These images were shot using the same body and settings as the light frames above.

Sample Images

Figure 1: Deneb shines left of center in front of several emission nebulae, including Gamma Cygni, North American, and the Pelican Nebula. Unmodified Canon EOS 6D, ISO1600, F/4, 60x60sec calibrated stack. Prints available.

 

Figure 2: Orion and Monoceros region, Canon EOS 6D, ISO1600, f/2.8, 29x120sec calibrated stack. Prints available.