Well done!

Fantastic sky and the buildings make the shot.

More superb captures of these superb birds

Another vote for the Sigma 150-500mm such a versatile lens
as long as you don't mind the weight.

For days that you want something light the 55-300mm plus
(possibly) the Pentax_A 1.4x-S TC.

Best bargains have to be the Ensinor primes particularly
the 135mm f/2.8 which focuses down to about 1M. It's
also sold under the Super Ozeck label.

Great shots as always. I really like the building in
No: 6 looks very expensive

Hoover sold a lot of vacuum cleaners when they gave away
FREE Flights to the US with them

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If you want bokeh the Chinon (Tomika) 55mm f/1.2 f/1.4 or f/1.9 are
hard to beat.

The Pentax_A 50mm f/1.4 is slightly better in poor light than
the f/1.7 because it let's about 1/3rd stop extra light through
at most f stops.

The f/1.7's have a flatter field which is an advantage copying
documents, group shots etc. For single portraits the f/1.4
would be OK because it's usually just what's in the centre
that matters. Under tungsten light the extra 1/3 stop could
be valuable.

Film especially slides is different the f/1.4 is very good
in bad light at f/2.8 to f/5.6

Just had a quick look at the DNG it looks sharp

I presume the Windermere shot was taken on another camera?
Strangely it shows the type of Jaggies that you would expect
from a camera that hasn't got an anti-alias filter in the
sails and aerials of the boat Is that due to
processing or the camera?

Some shots of a yachting marina would be an ideal test

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Great shots!... the top one looks like a Big Bird eating an apple

Excellent what really stands out are the highlights. I doubt if
you could match them on digital and medium format (and bigger)
beats even 35mm by about a stop in terms of highlight detail.