After nearly a century of producing lenses with
relatively modern optical and coating formulas I fail to see why the need for using a lens hood/shade to get the most from any lens is still in question. Lowell's examples and comments are an excellent case in point. I've yet to encounter a lens that didn't benefit from a hood except under the most perfect conditions for control of incident light if a true comparison were possible.
There's an old adage to the effect that it's not that the pig whistles so well, but that it can whistle at all that's truly amazing. The same could be said about hoodless lenses; some times they whistle pretty darn good without a hood, but that doesn't mean the hood was an afterthought in the designer's plan.
If I were to design a lens today, I'd provide for removing the hood -- a non-functioning, non-optical component -- to make the lens more convenient and compact for stowage. The fact that it was removable
for the convenience of the user would in no way imply that it wasn't intended as an integral part of the optical design and I'd state that as such.
If you accept the hood as a part of the original design, the expense and inconvenience make more sense. More the pity that for the sake of economy many lenses are sold without hoods as though they weren't important -- but the consumers brought that upon themselves through ignorance and price point buying. Besides, how many pro lens tests seriously evaluate the hood as part of the design today?
Even if previous lens designs had conditioned us to expect permanently attached hoods, (including adjustment for the field of view of zooms?), we'd not only still be complainin' about flare and lose of contrast under adverse conditions, we'd be bitchin' about the size of the lenses until someone introduced removable hoods for us to loose.
H2