Some people have use step-down rings to simulate a dome-style hood.
I've seen this for the x100 (49mm down to 30mm? ). I have never done that myself.
If you use a filter of any kind, I think a lens hood is generally needed to prevent glare - the filter glass is right out there.
OK.. I thought about what everyone said about shorter lens hood for the 27 pancake.. So here is what I dreamed up for a cheap solution..
I couldn't find any 39 to anything step down ringwhen I looked so I ended up stepping up to step down. I think a possible best of all worlds solution is if can one day find a 39 to 36 range step down..
I got on line and looked at the various combinations of step-up and step-down rings and came up with the following for myself
- 39to46 Step-up
- 46to43 Step-Down
- 43to37 Step-Down
- 37to28 Step-Down
Some comparison shots - against the Fotodiox RF style lens hood I already have.. Remember my main purpose is to keep my finger prints off the filter (I'm clumsy
🙁 !!). I believe in using a filter to protect the lens from early wear, so unless it is dedicated macro lens, I always use a filter and hood combo.
39to46Stepup plus 46to43Stepdown ring combo
Add the 43to37Stepdown ring to the mix
Add 37to28Stepdown ring
In terms of keeping my finger prints off the filter, all the combinations worked fine for me. The 37to28 Step-down ring introduced some vignetting. This was not seen prior to adding this last ring. The two ring combo is slight more than 1/3 the length of the normal RF style lens hood that it is comparing to and the three step ring setup is about half.
I did check out the dome shaped lens hood that Andy mentioned, but there is no simple 39to41 step-up ring to adapt it. You would need to go 39to46 and then 46to41 for example. By the time your finished doing that, u really won't buy much if any savings in lens hood length compared to a two or three step ring DIY approach.
Gary