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Sigma 105mm F2.8 EX DG OS HSM Macro Lens for Sony SLR Camera
|Price:||$569.00 & FREE Shipping|
|You Save:||$400.00 (41%)|
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- Designed for use with full frame digital SLR cameras. May also be used with smaller APS-c size sensors with a corresponding effective increase in focal length to about 150mm with most cameras
- Focuses down to 1:1 magnification ratio at its closest working distance of 12.3 inches
- A hood adapter, lens hood, front & rear lens caps are included with the lens
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|Aperture Control Design||Aperture controlled by camera|
|Compatible Mountings||Sony/Minolta Alpha|
|Focus Type||Ring-type ultrasonic|
|Item Dimensions||4.98 x 3.08 x 4.98 inches|
|Item Display Weight||1.416 Kilograms|
|Item Weight||1.6 pounds|
|Lens Type||Prime lens|
|Macro Focus Range||0.31 m|
|Maximum Aperture Range||F2.8|
|Maximum Focal Length||105 mm|
|Maximum Format Size||35mm full frame|
|Minimum Focal Length||105 mm|
|Number of Diaphragm Blades||9|
|Number of Elements||16|
|Number of Groups||11|
|Photo Filter Thread Size||62 mm|
|Real Angle Of View||23.3 Degrees|
|Shipping Weight||3.13 pounds|
|Style Name||Sony SLR Camera|
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This item Sigma 105mm F2.8 EX DG OS HSM Macro Lens for Sony SLR Camera
|Shipping||FREE Shipping||FREE Shipping||FREE Shipping||FREE Shipping||FREE Shipping||FREE Shipping|
|Sold By||Norman Camera & Video||Focus Camera||Adorama Camera||Adorama Camera||Amazon.com||Amazon.com|
|Compatible Camera Mount||Sony/Minolta Alpha||—||Sony/Minolta Alpha||Sony/Minolta Alpha||Sony Alpha, Minolta AF||Sony/Minolta Alpha|
|Focus Type||Ring-type ultrasonic||Micromotor||Screw drive from camera||Screw drive from camera||Micromotor||Screw drive from camera|
|Item Dimensions||3.08 x 4.98 x 4.98 in||2.83 x 3.82 x 2.83 in||2.95 x 3.9 x 2.95 in||2.83 x 2.36 x 2.83 in||3.54 x 7.64 x 3.54 in||3.5 x 4.53 x 3.5 in|
|Item Weight||1.6 lbs||0.89 lb||1.11 lbs||0.65 lb||2.93 lbs||2.31 lbs|
|Lens Type||Prime lens||Prime lens||Prime lens||Prime lens||Zoom lens||wide-angle|
|Maximum Focal Length||105 millimeters||90 millimeters||100 millimeters||50 millimeters||200 millimeters||135 millimeters|
|Minimum Focal Length||105 millimeters||90 millimeters||100 millimeters||50 millimeters||70 millimeters||135 millimeters|
|Photo Filter Thread Size||62 millimeters||55 millimeters||55 millimeters||55 millimeters||77 millimeters||77 millimeters|
The Sigma 105mm f/2.8 EX DG OS HSM Macro Lens for Sony EOS DSLR Cameras offers advanced performance of close-up photography. The OS (Optical Stabilizer) system enables handheld close-up photography. A Special Low Dispersion (SLD) lens and one high refractive index SLD lens provide excellent correction for all types of aberration and distortion. A floating focusing system moves two different lens groups in the optical path to different positions. This system compensates for astigmatic aberration and spherical aberration and provides extremely high optical performance from infinity to 1:1 Macro.The Super Multi-Layer Coating reduces flare and ghosting, providing high contrast images. It is also possible to use this lens with Sigma's APO TELE CONVERTERS. The HSM (Hyper Sonic Motor) ensures quiet and high speed autofocus as well as full-time manual focus capability. This lens features a splash proof design for use in harsh conditions and a rounded 9 blade diaphragm creating an attractive blur to the out of focus areas of the image.
From the Manufacturer
High performance, large aperture medium telephoto macro lens with OS (Optical Stabilizer).
High performance, large aperture medium telephoto macro lens with OS (Optical Stabilizer). SLD glass provides good control of aberration and the floating inner focus system ensures high rendering throughout the focusing range. By using Sigma's APO Tele Converter, it is possible to take photos at greater than 1:1 magnification. HSM ensures a quiet and high speed AF as well as full-time manual focus override. This lens has a rounded 9 blades diaphragm which creates an attractive blur to the out of focus areas.
Large aperture medium telephoto macro lens
This medium telephoto macro lens allows you to maintain an appropriate distance from subjects while still getting close up photos. Since the working distance at its closest focusing position is 142mm, shadows of the lens and camera will not affect photography making it suitable for taking photos of subjects, such as flowers, under natural lighting conditions. In comparison to the Sigma 50mm and 70mm macro lenses, the main subjects can be defined with perfectly smooth and blurred backgrounds.
High rendering performance
The lens power layout produces excellent optical performance. High refractive index SLD (Special Low Dispersion) glass corrects chromatic aberration, spherical aberration and field curvature. It ensures high rendering performance at all shooting distances. The Super Multi-Layer Coating reduces flare and ghosting, maintaining quality images with high contrast.
Handheld photography with ease
Sigma's OS (Optical Stabilizer) system offers effective correction of approximately 4 stops. As the stabilization effect is visible through the viewfinder, it aids composition and accurate focusing.
* The OS effectiveness will gradually decrease as the shooting distance becomes shorter.
Floating inner focusing
This lens incorporates floating inner focusing which moves two lens groups separately. This minimizes aberrations which occur as shooting distance changes, and enables stable rendering of the image from infinity to 1:1 magnification. This also corrects image distortion, especially when taking close-up pictures. Since focusing does not change its overall length, this lens is easy to hold and use.
Quiet and speedy AF
HSM indicates lenses equipped with a Hyper Sonic Motor, driven by ultrasonic waves. HSM provides quiet and high speed AF. It is also possible to use full-time manual focus, even if the lens is set to autofocus.
Rounded 9 blades diaphragm
This lens has a rounded 9 blade diaphragm which creates an attractive blur to the out of focus areas. This also creates smooth, rounded out of focus highlights when taking photos which have a strong light source in the background such as lights shining on the surface of water.
In a conventional lens, focusing requires an extension of the entire lens or the front lens group. However, to better accommodate autofocusing mechanisms and closeup photography, a need has arisen for lenses that do not change their length during focusing or suffer from focus-dependent variation in aberration. Therefore, Sigma has developed focusing systems that only move elements within the lens barrel. These incorporate smaller and lighter moving lens elements which help improve auto-focus speed. With their unchanging barrel length and small variation in the center of gravity, these lenses also enhance balance and stability for the photographer. Furthermore, since the front of the lens does not rotate, polarizing filters can be used with extra convenience.
|Lens Construction||16 Elements in 11 Groups|
|Angle of View||23.3 degrees|
|Number of Diaphragm Blades||9 Blades (Rounded diaphragm)|
|Minimum Focusing Distance||31.2cm / 12.3in.|
|Filter Size||Diameter 62mm|
|Dimensions||Diameter 78.3mm x Length 126.4mm / 3.1in. x 5.0in.|
|Weight||725g / 25.6oz.|
MTF (Modular Transfer Function) is one of the measurements that evaluates a lens' performance, and it contrasts sensitivity at different spacial frequencies. The horizontal axis is in millimeters and shows the distance from the center of the image toward the edges, and contrast value (highest value is 1) is shown in the vertical axis.
The readings at 10 lines per millimeter measure the lens' contrast ability (red lines), repeating fine parallel lines spaced at 30 lines per millimeter measure the lens' sharpness ability (green lines), when the aperture is wide open. Fine repeating line sets are created parallel to a diagonal line running from corner to corner of the frame, are called Sagittal lines (S) and sets of repeating lines vertical to these lines are drawn, called Meridional (M) line sets.
effective distortion: When you take a picture of a lattice pattern, it will appear as the blue dotted line shows. the red line illustrates how the lattice pattern will appear in the actual picture when any lens distortion is taken into account.
relative distortion: In this chart, the horizontal axis shows the ideal image height (the distance from the center to the edge of the image [mm]). The vertical axis shows the extent of distortion. The extent of the distortion is represented by how much Y, which is the actual image height, grows (or shrinks) against Y0 which is the ideal image height.
Extent of distortion: D[%]=(Y-Y0/Y0)x100
When you take the picture of a square object, if the distortion amount show a minus value, the image will be seen as expanded (Barrel distortion). If the distortion amount is a plus value, it will be seen as a recessed (pincushi on distortion). When the distortion value is close to 0, the appearance of distortion is very minimal.
The horizontal axis shows the image height (the distance from the center to the edge of the image [mm]). The vertical axis shows the amount of light in the image (based on the amount of light in the image center being 100%). If the peripheral amount of light is lower than the center, the four corners of the image will be darker (vignetting).
Top Customer Reviews
1: Autofocus speed is fast. Really fast. As long as you aren't focusing from the front to back of its range its AF will impress. It's also silent which is a nice bonus.
2. Doesn't extend. This is more a personal thing, but an extending lens can distract models and unbalances the camera.
3. Stabilization. This is less important to me because I usually shoot with strobes and have IBIS, but great if you do any shooting in low light. Huge benefit for non-tripod users.
I am also really impressed by the build quality and hood (which is adaptable for Full Frame or APS-C). I'm not much of a tech-nut so I haven't tested the sharpness extensively, but macro lenses are always sharp and this seems like it will be a perfect prime for all situations.
If you can get it on sale it's a no brainer, don't even bother looking at other primes in this focal length. At full price it's more expensive than other macros, but if you like the 105mm focal length it's absolutely worth the investment.
Love the OS and find it effective gaining about 2 stops. Did not notice any excessive noise.
Auto focusing is near silent and accurate, maybe a little on the slow side. You can manually fine-tune focusing even in AF mode just by turning the focusing ring.
The focus limiter is a useful addition since the in-camera focus limiter of the a77ii does not function with my Sigma lenses since the distance settings are not communicated between camera and lens.
Optimum sharpness of this lens appears to be when stopped down to f5.6 and beyond.This is not much of a problem with a macro lens since you need to stop down anyways to get any kind of depth of field.
The bokeh of this lens is about as good as it gets which seems to be a trademark of all the Sigma lenses I own.
I highly recommend this lens to anyone that wants to dabble into life size macro photography.
The focal length of 105mm gives you some needed working distance and adding a 1.4x teleconverter gives you even more versatility.