Compare lenses at FINALVERDICT.com

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Brands
Pentax
Sigma

Lens Mount
Pentax K (DA) (4)

1st/3rd Party
1st party (2)
3rd party (2)

Lens Type
Superzoom (4)

Macro
No (2)
Yes (2)

Optical Zoom
At least:

Image Stabilisation
No (4)

Video Lens
No (4)

Tilt Shift
No (4)

Weather Resistant
No (3)
Yes (1)

UK Price
At most:

Length
At most:

Weight
At most:

Max Aperture Wide
At most:

Max Aperture Tele
At most:

Focal Length Wide
At most:

Focal Length Tele
At least:

Magnification Ratio
At least:

Min Focus Distance
At most:

Aperture Blades
At least:

Lenses for CSC's (Compact System Cameras) and DSLR Cameras

Lenses	Optical Zoom	UK Price (£ GBP)	Length (mm)	Weight (g)	Max Aperture	Max Aperture Wide	Max Aperture Tele	Focal Length Wide	Focal Length Tele	Min Focus Distance (m)
Pentax 18-135mm F3.5-5.6 ED AL IF DC WR Lens	7.50	£379.00	73 x 76 mm	405.00	3.5	3.5	5.6	18 (or 27 in full frame equiv.)	135 (or 202.5 in full frame equiv.)	0.4
Pentax 18-270mm F3.5-6.3 SMC DA SDM Lens	15.00	£504.00	75.8 x 89 mm	453.00	3.5	3.5	6.3	18 (or 27 in full frame equiv.)	270 (or 405 in full frame equiv.)	0.5
Sigma 18-250mm F3.5-6.3 DC Macro HSM (Pentax Fit)	13.89	£479.99	73.5 x 88.6 mm	471.00	3.5	3.5	6.3	18 (or 27 in full frame equiv.)	250 (or 375 in full frame equiv.)	0.4
Sigma 18-300mm F3.5-6.3 C DC Macro HSM - Pentax Fit	16.67	£499.99	79 x 101.5	585.00	3.5	3.5	6.3	18 (or 27 in full frame equiv.)	300 (or 450 in full frame equiv.)	0.39