I’m not a horn player, but as an orchestrator, I would avoid these high pitches, especially several in a row on short notes. They are formally possible, but these are probably challenging even for a pro. This looks more like trumpet territory.
Up until written high G (12th partial) shouldn’t pose a problem for most players. I don’t think there’s something special about horns in F. They’re standard anyway nowadays.
But maybe there are real hornists on this forum who can give more insights.
You can write these horn pitches but won’t always get accurate results. This isn’t characteristic horn writing but is playable by professionals. It will take some looking over for the players. It also depends on the equipment used, much easier on a triple horn for most. The notes will be very prominent, covering the bassoons. An orchestration forum might have more insights for you!
@rkrentzman yes, I wasn’t referring to trumpets either. The “modern” French Horn tries to incorporate different Natural horns - and calls the transposition “Horn in D” or “Horn in F” or “Horn in A”.
Originally Horn players had different crooks (or even instruments) to be able to play in the required keys. This was also marked as “Horn in D”, “Horn in Dis” or similar…
Yes that’s why I was asking whether the first example is a copy of an original score. With horns it’s easy to get the wrong octave when copying and then transferring it to modern French Horn…
On a similar note: for awhile I used to write horn parts using an alto clef (but viewed in concert pitch), so I could more easily visualize their range as being not too high and not too low. In many ways I feel like it would’ve been the perfect clef for Horns – I got the idea from Bruce Boughton who apparently got the idea from Prokoviev.
Nowadays I actually do use their standard treble clef, and will often switch between concert and transposed pitch views. Concert is really just easier for me to work and write quickly, but I think seeing the parts as the players would is helpful too. I feel a general good rule of thumb with Horns, in transposed view, is to avoid ledger lines on the higher part of the staff. Not impossible to play, but not an easy range for hornists, sound production and intonation will get a lot more dodgy up there.