The type of photography that you are planning to use is an important decision factor. Here we have evaluated the Tamron 17-70 F2.8 Di III-A VC and the Lensbaby Velvet 56 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. Tamron 17-70 F2.8 Di III-A VC is the longer of the two lenses at 119mm. The Lensbaby Velvet 56 with a length of 86mm, is 33mm shorter. Besides being longer, the Tamron 17-70 F2.8 Di III-A VC also has a larger diameter of 75mm compared to the Lensbaby Velvet 56's 72mm diameter.
Below you can find a scaled side-by-side image of Tamron 17-70 F2.8 Di III-A VC and Lensbaby Velvet 56 to get a better idea of how their sizes compare in real life.
Comparison image of the Tamron 17-70 F2.8 Di III-A VC and the Lensbaby Velvet 56 Size and Weight 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. Lensbaby Velvet 56 weighs 400g, 23% (125g) lighter than the Tamron 17-70 F2.8 Di III-A VC's weight of 525g.
Filter Threads
The Tamron 17-70 F2.8 Di III-A VC has a filter size of 67mm whereas the Lensbaby Velvet 56 has a 62mm diameter. Larger filters are generally more expensive than the smaller ones given all the other features are equal.
Below are links to the 67mm filters that we recommend you to consider for the Tamron 17-70 F2.8 Di III-A VC:
And these are the 62mm filters that we recommend for the Lensbaby Velvet 56:
Lens Mounts
Both the Tamron 17-70 F2.8 Di III-A VC and the Lensbaby Velvet 56 has the same Fujifilm X lens mount . Some of the latest released cameras that are compatible with the Fujifilm X lenses are Fujifilm X-T30 III , Fujifilm X-E5 and Fujifilm X-M5 .
Tamron 17-70 F2.8 Di III-A VC is also available in the Sony E mount.
Lensbaby Velvet 56 is also available in Canon EF , Micro Four Thirds , Nikon F (FX) , Pentax KAF3 , Samsung NX , Sony Alpha and Sony E mounts.
Focal Range
Tamron 17-70 F2.8 Di III-A VC has a focal range of 17-70mm and
4.1X zoom ratio which has an effective (full-frame 35mm equivalent) focal range of
25.5-105mm when used on a APS-C / DX format camera.
On the other hand, the Lensbaby Velvet 56 is a prime lens with fixed focal lenght of 56mm.