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Message: <blockquote data-quote="Theo98" data-source="post: 3290967" data-attributes="member: 132099">To Porro or Not to Porro...?After owning a descent bushnell 12x50 for the past 30 years ($100 back then), I decided to see for myself if the latest alpha porro offerings sweetened up their different "porro-like 3D view" in reference to the current, engineering advanced, fully multi-coated alpha roof optics available today.3D GAME ON!In the "P" corner: various powered vintage Porros to play with (Sears-4, Jason Statesman, Manon, Bushnell) and the latest breed, a Yosemite BX-1, a Habicht 8x30 W and a Habicht 10x40 W GA.In the "R" corner: The latest Roof 8x32 BX-3 Mojave (my choice after M7's, CL's, and SV's comparisons), a BX-3 Mojave 10x42 and of course, the EL 10x50 SV.After collimating a couple of the Sears and spending detailed time to set IPDs, diopters and sharp focuses, spent 3-4 hrs each day this past week glassing with 12 pair of binos (pre-dawn through sunrise, various daylight times\lighting conditions and sunset through post-dusk lighting scenarios). Seems like a complicated comparative study, but in truth, a simple task of just being attentive to the 3D aspect of each optical instrument's presentation.OPTICAL WARNING: My Vision, My Brain, My Findings - Your Discoveries Could\Will Differ: Not surprising, All of the porros exhibited a 3D aspect that were a little greater than the roofs (from 25m to 100m viewings). Well, you might consider that more pleasing and natural (as Henry stated above). However, to me what Was Surprising in all 10 of the porros, I sensed a Definite Vertical Compression in the FOV, as if the image was being squeezed from above and below. The FOV's felt as if looking through a 40-50mm tube (but didn't look that way). It's hard to describe this weird feeling, but ever pair of poros (including the Habicht's) gave me immediate eye strain as I tried to consciously stabilize the effect I was sensing. Glassing for longer than 2-3 minutes with each would start up a headache (I know, a head like mine should hurt). 3<img src="data:image/gif;base64,R0lGODlhAQABAIAAAAAAAP///yH5BAEAAAAALAAAAAABAAEAAAIBRAA7" class="smilie smilie--sprite smilie--sprite1" alt=":)" title="Smile    :)" loading="lazy" data-shortname=":)" />When I'd switch to one of the 3 roofs, the eye strains immediately subsided and a relaxed, comfortable view would take over, Especially when going to the 10x50 SV's (just like Robert described above)! I can steadily glass for as long as my arms hold up with these roofs and have -Zero- eye strain or fatigue! All 3 of the roofs, again Especially the 10x50's, present a FOV, DOF and perfect "very natural" spacial dimension that is as close to being there, but in an immersive view that is 8 to 10 times closer than my normal sight! I can easily feel and see the Stereopsis of the roofs that for me, carries no eye strain! :t:  I know weird, but for Me, the eye strain issues and the small incremental 3D enhancement of the "Porro Like" view has been Suspect! <img src="data:image/gif;base64,R0lGODlhAQABAIAAAAAAAP///yH5BAEAAAAALAAAAAABAAEAAAIBRAA7" class="smilie smilie--sprite smilie--sprite2" alt=";)" title="Wink    ;)" loading="lazy" data-shortname=";)" />Ted</blockquote>

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