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Don't overthink it or enter those debates, it's not rocket science.
A hood will help with stray light, which leads to flares in the images and robs a bit of contrast.
If it's the correct one for the lens being used it won't vignette (darken the corners).
Some lenses are actually not very sensible to stray light, so a hood isn't really necessary.Filters are another piece of glass in front of everything so you might think about putting a shit / uncoated filter in front of your expensive lens, it might just be counter-productive.
When shooting digital you can do the whole colour filter thing in-camera or in post if you like,
so then there's just the issue with keeping dust and your Nutella-smeared stubby fingers off the front element - you're the judge if this is needed or not.
huh, interesting, thanks. I've never considered the hood - always seemed to me to be a redundant piece of plastic at the front which doesn't do much and sometimes increases the amount of shadowing I have in the corners. OK, well, I do think that is true, but I will experiment a bit.
NB, also saw this which completely supports your thoughts, @Ste_S :
That said, I also think a filter is of value: I have occasionally got pieces of dust (or even fingerprints!) on the front of lenses and believe the filter will help minimise the impact of this.
For example, this link supports the benefits of both (hoods and filters):
I've also seen that there are big debates! For example:
Finally, however, I have a lot of respect for the huge amount of experience contained on this (lfgss) forum, so would greatly value thoughts/recommendations for filters for my setup, if anyone has any. (Also, given the fact at least one of my lenses already has a hood).
Thanks again!