'Favorite' focal length is a metric I do not care to track. Any more than my 'favorite' ISO, 'favorite' white balance, 'favorite' focus distance, 'favorite' filter, 'favorite' pre-set, 'favorite' exposure method etc etc etc.
Some of my EXIF info data points from **one day** at the Oregon coast, Nikon FX camera...
View attachment 144234
Which data set is your favorite?
As most experienced shooters know, a zoom lens is often used at its widest and its shortest settings. Looking carefully at the above 894 shots, and 57 different focal lengths, considering the lenses I HAD WITH ME, it's easy to see that there are a few trends...I had the 28-200, 70-210,70-300,85/1.8 AF-S G prime,90 Tamron macro,180/2.8 prime, and a 50mm/1.8.
45,50,and 52mm: a total of 39 frames in that narrow zone.
120,122,124,135mm: A total of 3,7,13,and 24 frames, in that area....I've noticed this trend for years.
150,155,165, 170mm: Note the clustering of image here, in this focal length range. A total of 4,7,20,and 23 frames.
180mm: 82 frames or about 1 of 11 frames over the 894 pictures. Why? The 180/2.8 ED is a superb lens on the D610. SUPER-crisp!
200mm: the long end of the 28-200 zoom,most likely...116 frames at 200mm oput of 894 all day.
300mm: the loing end of the longest zoom, the 70-300...and at the Oregon Coast beaches, where "reach" and "whale watching at Boiler Bay" go hand in hand...132 frames.
The 7,800mm two shots?? Likely a mis-entered data from a non CPU lens...I have no idea...