Below is a listing of which OM lens hood is intended for which Zuiko
lens:

Lens (f.l./f#)	Lens Hood (1)(4)		Notes	Oly P/N
--------------------------------------------------------------------------
8/2.8		None, due to 180 deg FOV		N/A
16/3.5		None, due to 180 deg FOV		N/A
18/3.5		49mm --> 72mm step up ring metal	108-200
21/2.0		55mm screw in/57mm slide on		108-232
21/3.5		49mm screw in/51mm slide on	(2)	108-210

24/2.0		55mm screw in				108-211
24/2.8		49mm screw in				108-212
24/3.5 Shift	Built in
28/2.0		49mm screw in				108-220
28/2.8		49mm screw in rubber		(7)(9)	108-221	

28/3.5		49mm screw in metal		(7)(9)	108-221
35/2.0		55mm screw in metal			108-222
35/2.8		51mm slide on metal/rubber 	(3)	108-230
35/2.8 Shift	49mm screw in/51mm slide on	(2)	108-210
40/2		49mm screw in metal/rubber	(6)	108-240

50/1.2		51mm slide on metal/rubber	(3)	108-233
50/1.4		51mm slide on metal/rubber	(3)	108-230
50/1.8		51mm slide on metal/rubber	(3)	108-230
50/2 Macro	Built in				N/A
50/3.5 Macro	Built in				N/A

55/1.2		55mm slide on				Unknown
85/2		49mm screw in metal/rubber	(6)	108-240
90/2		57mm slide on rubber		(5)	108-242
100/2		Built in				N/A
100/2.8		49mm screw in metal/rubber	(6)	108-240

28-48/4		55mm screw in rubber		(8)	Unknown
35-70/3.5-4.5	51mm slide on metal/rubber	(3)	Unknown
35-70/3.6	60mm slide on rubber			Unknown
35-70/4		57mm slide on rubber		(10)	Unknown
35-70/4 PF	None??? 			(11)	Unknown

35-80/2.8	Bayonet mount tulip, rubber		108-213
35-105/3.5-4.5	57mm slide on rubber		(10)	Unknown

80/4 Macro	None					N/A
135/4.5 Macro	57mm slide on rubber		(5)	108-242

All other lenses have built-in lens hoods.

(1) Where two different hoods are listed for the same lens, the second
hood type is from the 1985 edition of "The OM System Lens Handbook",
while the first hood type is from a 1980 edition of the OM Lens Group
Manual.
(2) Both these lenses use the same hood.
(3) These five lenses all use the same hood.
(4) Note that originally many hoods were metal, but all current hoods
seem to be rubber.
(5) Both these lenses use the same hood.
(6) These three lenses use the same hood.
(7) The hoods for these two lenses are interchangable.
(8) The hoods for the 28/2.8 or 28/3.5 can also be used on this lens.
(9) The hood for the 28-48/4 can also be used on these lenses
(10) The hoods for these two lenses are interchangable.
(11) This lens could probably safely use the hood used on 40/2, 85/2,
and 100/2.8.


Finally, thanks to the following folks who helped compile this list:

	PCA Cala <PCACala@aol.com>
	Frank van Lindert <lindertv@knmi.nl>
	Mikael von Numers <mnumers@abo.fi>
	"John A. Prosper" <prosper@freenet.tlh.fl.us>
	Jeff Braun <72407.1301@compuserve.com>