The type of photography that you are planning to use is an important decision factor. Here we have evaluated the Hartblei 40mm F4 IF TS and the Tamron 35mm F1.8 Di VC USD for their suitability to various photography scenarios:
Size and Weight Comparison
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. Tamron 35mm F1.8 Di VC USD weighs 450g, 70% (1100g) lighter than the Hartblei 40mm F4 IF TS's weight of 1550g.
Filter Threads
The Hartblei 40mm F4 IF TS has a filter size of 86mm whereas the Tamron 35mm F1.8 Di VC USD has a 67mm diameter. Larger filters are generally more expensive than the smaller ones given all the other features are equal.
Below are links to the 86mm filters that we recommend you to consider for the Hartblei 40mm F4 IF TS:
And these are the 67mm filters that we recommend for the Tamron 35mm F1.8 Di VC USD:
Lens Mounts
Both the Hartblei 40mm F4 IF TS and the Tamron 35mm F1.8 Di VC USD has the same Nikon F (FX) lens mount. Some of the latest released cameras that are compatible with the Nikon F (FX) lenses are Nikon D6, Nikon D780 and Nikon D3500.
Hartblei 40mm F4 IF TS is also available in Canon EF , Pentax KAF and Sony Alpha mounts.
Tamron 35mm F1.8 Di VC USD is also available in Canon EF and Sony Alpha mounts.
Focal Range
Hartblei 40mm F4 IF TS is a prime lens with fixed focal lenght of 40mm. When it is mounted on an APS-C sensor camera with 1.5x crop, it provides a 35mm (FF) equivalent of
60mm.
On the other hand, the Tamron 35mm F1.8 Di VC USD is a prime lens with fixed focal lenght of 35mm. When it is mounted on an APS-C sensor camera with 1.5x crop, it provides a 35mm (FF) equivalent of 52.5mm.