Wide Angle Lens Hood

I have have a Vivitar (Badged) 28/90 2.8/3.5 zoom lens which I have had for a few years and have decided to get it out and press it into use again on a Minolta body. For a brand that has sold some dubious lenses in the past, it is incredibly sharp from one stop down. The filter size is 67mm, which is no problem, but getting a wide angle hood to fit and avoid clipping the corners is proving to be a bit of a challenge. I have one that will not clip so long as I remove the very slim filter from the lens which is only 3mm deep but I would prefer to leave the filter on because the glass is faultless. Also as the viewfinder only shows 92% of the actual frame, I anticipate the cut off even without the filter will be visible. Any suggestions please.

I haven't bought it yet, but I have been looking at this one myself. It's only $7, and one of the reviews specifically states that it was good at avoiding vignetting. I see you're in the UK though, so I'm not sure where it would be sold there.

Sensei 67mm Wide Angle Lens Hood

Put the wide angle lens hood, open the camera back, set to lens to the largest aperture, set the shutter to 'B', open the back, fire the shutter and hold it open. Then look through the back of the lens and search the corners for vingetting.

Couple of thoughts- you could use an adjustable compendium hood, plenty of those around. Or as a designated wide angle hood there should be plenty available on ebay. I got one for my 17mm Tamron and it doesn’t vignette.

The main reason I use a hood on a wide angle lens hood is to protect the lens [so I don't have to use a filter for protection.]

As luck would have it, I was 'phoned by another photographer friend today and we got talking and he he has a plastic 'petal' type lens-hood with a 67mm thread which he used to use on a 50mm Bronica SQa lens but he no longer uses it. I picked it up and tried it on my lens and it does vignette a little but being made from ABS plastic and it cost nothing I can try using a craft knife to trim the parts away that are causing the problem which seem to be in the shaped molding at the sides. so it should not be too difficult.