Canon's standard long zoom from the 1990's ran through several iterations, with the IS version offering several improvements over other varients. Image quality is much improved in the 2005 70-300, which effectively replaces it.
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Lens specifications
| Focal Length & Maximum Aperture |
75-300mm 1:4-5.6 |
| Lens Construction |
15 elements in 10 groups |
| Minimum Aperture |
32-45 |
| Closest Focusing Distance |
1.5m 0.25 x magnification |
| Filter Size |
58mm |
| Max. Diameter x Length, Weight |
78.5 x 138.2mm, 650g |

Which 75-300? - a list of all versions
| Canon EF 75–300mm f/4–5.6 lens |
| Attribute |
(original) |
USM |
IS USM |
II |
II USM |
III |
III USM |
| Key features |
| Image stabilizer |
No |
Yes |
No |
| Environmental Sealing |
No |
| USM |
No |
Yes |
No |
Yes |
No |
Yes |
| Technical data |
| Maximum aperture |
f/4–5.6 |
| Minimum aperture |
f/45 |
f/32-45 |
f/45 |
f/32–45 |
| Filter diameter |
58 mm |
| Physical data |
| Weight |
500 g |
495 g |
650 g |
480 g |
| Max. Diameter |
73.8mm |
71.1mm |
78.5mm |
71mm |
| Max. Length |
122mm |
138.2mm |
122mm |
| Groups/elements |
9/12 |
9/13 |
10/15 |
9/13 |
| Aperture blades |
7 |
8 |
7 |
| Closest focusing distance |
1.5 m |
| Retail information |
| Release date |
March 1991 |
June 1991 |
September 1995 |
July 1995 |
March 1995 |
April 1999 |
EF75-300mm f/4-5.6 IS USM reviews and articles
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Sample images