| Year | 1985 |
| Lens Groups | 11 |
| Lens Element | 14 |
| Aperature Blades | 5 |
| Minimum Aperture | f/22 |
| Closest Focusing | 1.2 m |
| Max. Magnifcation | 1:9.7 (0.103x) |
| Filter Size | 58 mm |
| Diameter x Length | 66.8 x 83.7 mm |
| Weight | 345 gr (0.76 lb) |
| Hood | BW-58C |
Given the hype around its older sibling with constant aperture, this little zoom doesn't seem to garner a lot of interest which is reflected by the reasonably prices second hand. Yet, the Canon New FD 35-105mm f/3.5-4.5 was the first photo lens equipped with a molded aspherical lens and this fact certainly helps for image quality and compacity. Optical performance on full frame (Sony A7) is very good and perfectly useable down to the image borders at f/8 and smaller apertures, the outmost corners stay a little bit fuzzy. For landscape this lens is perfect (vignetting is very well controlled) but architecture is not part of its best photography genres given that distorsion increases with focal length (note that the latter is practically zero at 35 mm, which is very useful for landscape and architecture, but quite heavy pincushion shaped at longer focal lengths). The performance against the light is quite OK for a zoom with that many optical elements, much better than that of the older fixed aperture lens). So, i think in real life (and not in the mind of photographers who only compare specs and alleged use of plastic parts...), the Canon New FD 35-105mm f/3.5-4.5 is a much more useful lens than the Canon New FD 35-105mm f/3.5, at least for me (i have both).
This smaller sibling of the 35-105 is a great lens and slightly better performing in terms of IQ compared to it's brother, but has some hard things for it to live up to.
The 3.5-4.5 is a great lens in terms of general sharpness and especially size. It is almost half the size of the 3.5 constant version and has an molded aspherical element inside. Looking through the glass in a photo, there is a noticeable difference wide open, but very similar stopped down. It is also quite affordable.
The Push pull is not very useful for video unless one wants to do a zoom whip while calculating the parfocal nature of it's focus. It is also a very sensitive zooming mechanism as it is very easy to change from 35 to 50 without meaning to. It also has a variable aperture which is probably why this lens is so small.
If you want an aspherical non-L, this is your lens. It is affordable and good at wide open image quality while keeping a compact size.