69points

Pentax smc DA 40mm F/2.8 XS Lens

Pentax smc DA 40mm F/2.8 XS Lens
vs

Pentax smc DA 40mm F/2.8 XS Lens review: specs and price

Pentax smc DA 40mm F/2.8 XS Lens
Pentax smc DA 40mm F/2.8 XS Lens
69
points

Why is Pentax smc DA 40mm F/2.8 XS Lens better than the average?

  • Widest aperture
    f/2.8 vsf/3.014419087136928
  • Widest aperture at maximum focal length
    2.8fvs3.63f
  • Minimum focal length
    40mmvs50.52mm
  • Minimum focus distance
    0.4mvs0.74m
  • Aperture blades
    9vs7.89
  • Weight
    45gvs625.27g

Top specs and features

General info

1.maximum focal length

40mm

A longer maximum focal length allows you to focus in on a small part of a scene, and offers a narrower angle of view than shorter focal lengths.

Best

Sigma 300-800mm F5.6 EX DG APO HSM

800mm

2.minimum focal length

40mm

A shorter minimum focal length allows you to get more of the scene in the photo, and offers a wider angle of view than longer focal lengths.

Best

Canon EF 35mm F/2 IS USM

0.24mm

3.Front element doesn't rotate
Pentax smc DA 40mm F/2.8 XS Lens

The front element doesn’t rotate. This is important if you use filters, as some such as polarising or gradient filters have to be orientated a certain way.

4.Has a metal mount
Pentax smc DA 40mm F/2.8 XS Lens

A metal mount is generally superior to a plastic mount as it is more durable.

5.weight

45g

Best

Canon EF 400mm F/4 DO IS II USM

2.1g

6.has or is a prime lens
Pentax smc DA 40mm F/2.8 XS Lens

A prime lens has a fixed focal length. In general, these are sharper, with a wider aperture.

Optics

1.optical zoom

1x

The zoom range is the ratio between the longest and shortest focal lengths. A higher zoom range means that the lens is more versatile.

Best

Tamron 18-400mm f/3.5-6.3 Di II VC HLD

22.2x

2.maximum angle of view

39°

At the shorter end of the lens you get the widest angle of view. This allows you to fit more of the scene into the photograph (based on APS-C format).

Best

Leica APO-Summicron-SL 75mm f/2 ASPH

318°

3.magnification

0.13x

A true macro lens has a magnification of 1:1. This means that the image produced is a life-size representation of the subject being photographed.

Best

Leica Vario-Elmarit-SL 24-90mm F2.8-4 ASPH

14x

4.minimum angle of view

39°

At the longest end of the lens you get the narrowest angle of view. This allows you to fit a small portion of the scene into the photograph, such as when you are zooming in on a subject (based on APS-C format).

Best

Tamron SP 150-600mm F/5-6.3 Di VC USD

Aperture

1.widest aperture

f/2.8

With a wider aperture the sensor can capture more light, helping to avoid blur by enabling a faster shutter speed. It also provides a shallow depth of field, allowing you to blur the background to focus attention on the subject.

Best

Samyang XP 50mm f/1.2

f/1.2

2.widest aperture at maximum focal length

2.8f

With a wider aperture the sensor can capture more light, helping to avoid blur by enabling a faster shutter speed. It also provides a shallow depth of field, allowing you to blur the background to focus attention on the subject.

Best

Samyang XP 50mm f/1.2

1.2f

3.Has rounded aperture blades
Pentax smc DA 40mm F/2.8 XS Lens

Similar to the number of aperture blades, rounded blades affect the way the light gets through to the sensor. Rounded blades, often only found on more expensive lenses, improve the appearance of the out-of-focus areas. This allows you to attain better, softer looking bokeh in your photos.

4.smallest aperture at maximum focal length

22f

A smaller aperture reduces the amount of light reaching the sensor. This is important in bright conditions where a wider aperture could result in your image being overexposed. Another advantage is that with a smaller aperture you get a greater depth of field, and can keep all of the image in focus.

Best

Pentax HD DA 560mm F5.6 ED AW

45f

5.aperture blades

9

The aperture controls how much light gets through to the camera’s sensor. More blades is often an indicator of a better quality lens. It also allows you to achieve much nicer looking bokeh when blurring out your background, whereas a lens with less blades will often produce harsher, more polygonal bokeh.

Best

Lensbaby Velvet 85

12

6.smallest aperture at minimum focal length

22f

A smaller aperture reduces the amount of light reaching the sensor. This is important in bright conditions where a wider aperture could result in your image being overexposed. Another advantage is that with a smaller aperture you get a greater depth of field, and can keep all of the image in focus.

Best

Pentax HD DA 560mm F5.6 ED AW

45f

Focus

1.Has focus motor
Pentax smc DA 40mm F/2.8 XS Lens

Lenses with a built-in focus motor can autofocus even if the camera does not have its own focus motor.

2.minimum focus distance

0.4m

This is the closest distance that the lens can focus. A shorter minimum focus distance allows you to get closer to your subject, and is particularly important when doing macro photography.

Best

Zeiss Batis 40mm f/2 CF

0.02m

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