The type of photography that you are planning to use is an important decision factor. Here we have evaluated the Olympus ED 90-250mm f2.8 and the Olympus ED 35-100mm f2.0 for their suitability to various photography scenarios:
Size and Weight Comparison
The size of a lens is a crucial factor to consider when comparing two lenses. Olympus ED 90-250mm f2.8 is the longer of the two lenses at 276mm. The Olympus ED 35-100mm f2.0 with a length of 214mm, is 62mm shorter. Besides being longer, the Olympus ED 90-250mm f2.8 also has a larger diameter of 124mm compared to the Olympus ED 35-100mm f2.0's 97mm diameter.
The weight of a lens is equally significant as its external dimensions, particularly if you intend to handhold your camera and lens combination for extended periods. Olympus ED 35-100mm f2.0 weighs 1650g, 49% (1620g) lighter than the Olympus ED 90-250mm f2.8's weight of 3270g.
Filter Threads
The Olympus ED 90-250mm f2.8 has a filter size of 105mm whereas the Olympus ED 35-100mm f2.0 has a 77mm diameter. Larger filters are generally more expensive than the smaller ones given all the other features are equal.
Below are links to the 105mm filters that we recommend you to consider for the Olympus ED 90-250mm f2.8:
And these are the 77mm filters that we recommend for the Olympus ED 35-100mm f2.0:
Lens Mounts
Both the Olympus ED 90-250mm f2.8 and the Olympus ED 35-100mm f2.0 has the same Four Thirds lens mount. Some of the latest released cameras that are compatible with the Four Thirds lenses are Olympus E-5, Olympus E-600 and Olympus E-620.
Focal Range
Olympus ED 90-250mm f2.8 has a focal range of 90-250mm and
2.8X zoom ratio which has an effective (full-frame 35mm equivalent) focal range of
180-500mm when used on a FourThirds format camera.
On the other hand, the Olympus ED 35-100mm f2.0 has a focal range of 35-100mm and 2.9X zoom ratio which has an effective (full-frame 35mm equivalent) focal range of 70-200mm when used on a FourThirds format camera.