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
Sigma 100-400mm f/5-6.3 DG DN OS Contemporary
Sony E / 1135g
Fujifilm X100VI
APS-C / 521g
Workflow lens
Fujifilm X100VI is the stronger fit for travel and everyday carry.
Fujifilm X100VI leads on carry and size by 38 points.
Fujifilm X100VI leads on resale strength by 20 points.
Workflow score
Camera size studio
Relative body dimensions
Front, back and top views are drawn from external dimensions so the size relationship stays proportional.
View
Mode
Sigma 100-400mm f/5-6.3 DG DN OS Contemporary
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
Sigma 100-400mm f/5-6.3 DG DN OS Contemporary is the narrowest (40mm less than Fujifilm X100VI), Fujifilm X100VI is the shortest (13mm less than Sigma 100-400mm f/5-6.3 DG DN OS Contemporary), Fujifilm X100VI is the thinnest (65mm less than Sigma 100-400mm f/5-6.3 DG DN OS Contemporary), and Fujifilm X100VI is the lightest (614g less than Sigma 100-400mm f/5-6.3 DG DN OS Contemporary).
Fixed-lens bodies include their lens in the envelope; interchangeable bodies still need a lens attached.
Sigma 100-400mm f/5-6.3 DG DN OS Contemporary
Fujifilm X100VI
Class benchmarks
Decision matrix
Scores tuned for travel
Highlighted specs
Only specs that change the decision
Focal length
100-400mm
Sensor
40.2MP APS-C X-Trans 5 HR
Aperture
f/5 – f/6.3
Stabilisation
5-axis, up to 6 stops
Viewfinder
Hybrid OVF/EVF