Compare real-world fit, not spreadsheet noise.
Pick up to four products and tune the verdict around travel, hybrid work, wildlife, resale safety or pure value. GearAtlas weighs carry size, ecosystem cost, market timing and ownership risk in one calm decision surface.
Visual
Estimated
Ranked
Tamron 70-300mm f/4.5-6.3 Di III RXD
Full-frame / 550g
Fujifilm X100VI
APS-C / 521g
Workflow lens
Tamron 70-300mm f/4.5-6.3 Di III RXD is the stronger fit for travel and everyday carry.
Tamron 70-300mm f/4.5-6.3 Di III RXD leads on value and market timing by 6 points.
Camera size studio
Relative body dimensions
Front, back and top views are drawn from external dimensions so the size relationship stays proportional.
View
Mode
Tamron 70-300mm f/4.5-6.3 Di III RXD
Front view / 88 x 88mm
88 x 88 x 120mm
Fujifilm X100VI
Front view / 128 x 75mm
128 x 75 x 55mm
Width
Height
Depth
Weight
External dimensions and carry delta
Tamron 70-300mm f/4.5-6.3 Di III RXD is the narrowest (40mm less than Fujifilm X100VI), Fujifilm X100VI is the shortest (13mm less than Tamron 70-300mm f/4.5-6.3 Di III RXD), Fujifilm X100VI is the thinnest (65mm less than Tamron 70-300mm f/4.5-6.3 Di III RXD), and Fujifilm X100VI is the lightest (29g less than Tamron 70-300mm f/4.5-6.3 Di III RXD).
Fixed-lens bodies include their lens in the envelope; interchangeable bodies still need a lens attached.
Tamron 70-300mm f/4.5-6.3 Di III RXD
Fujifilm X100VI
Class benchmarks
Decision matrix
Scores tuned for travel
Highlighted specs
Only specs that change the decision
Focal length
70-300mm
Sensor
40.2MP APS-C X-Trans 5 HR
Aperture
f/4.5 – f/6.3
Stabilisation
5-axis, up to 6 stops
Viewfinder
Hybrid OVF/EVF