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The Zeiss SFL 8x30 compared with select current 8x30/8x32 roof binoculars
PART 2: Brief side-by-side comparisons
Comparison 2: Zeiss SFL 8x30 and Swarovski CL 8x30
Despite Swarovski's major upgrade of the CL in 2017, it seems to me that some still seem to regard and treat the CL as some sort of “stepchild” who isn’t invited to sit at the table with the family. Yet the CL is a serious competitor in the market of small, lightweight 8x30s. Roughly the size of the SFL and just 1 ounce heavier, the CL costs a little less than the SFL in most markets, but offers very good mechanical and optical performance.
If I have one criticism about the CL, it’s about the diopter adjustment knob which sits at the top of the central hinge between the eyepieces; I find it not only tricky to operate, but also impossible to adjust while observing at the same time. Maybe someone here can name a trick how to make good use of this odd mechanism. Mechanically, it works fine.
Focusing works fine in both, a tad smoother in the SFL. Achieving sharp focus is easy in both, ease of view comparable in my experience, despite the very different eyecup anatomy and size. Position of the focus wheel is very different and you may prefer one over the other, but both allow easy handling in their way.
The CL has less eye relief than the SFL, but still sufficient if I were to use my glasses when observing. The eyecups of the SFL provide for nice, firm clickstops, the CL doesn’t have any intermedieate stops, just “in” or “out”, but they keep their position while observing; they risk to move, however, once you take the eyecaps off or put them back on.
The FOV of the SFL is half a degree wider, which can be felt when observing. Central sharpness and image brightness are comparable, edge sharpness for my eye a bit better in the SFL, panning nice in both. For my eyes, the image of the CL is a tiny bit warmer than in the SFL.
Both binos require careful eye positioning if you want to avoid any central CA. Otherwise, CA remains very moderate. I would rate the SFL slightly ahead of the CL.
Stray-light control is at a good level in both binos; spikes on bright light sources are very slightly more pronounced in the CL (not really disturbing).
Overall, I found the optical differences between the SFL and the CL smaller than expected. Any birder should be able to happily use both with good success.
Personal verdict in a nutshell:
- Size and weight are comparable
- Ease of view is comparable
- FOV is wider in the SFL
- Sharpness and contrast are comparable, edge sharpness a bit better in the SFL
- Image brightness is comparable, image tone slightly warmer in the CL
- CA correction is slightly better in the SFL
- Usable eye relief is much better in the SFL, sufficient for many spectacle wearers in the CL
fwiw Canip
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