Sony SAL-300F28G - Manual (Page 2)

Direct manual focus (DMF)
Even when AF is set, the setting is switched to MF automatically if you rotate the focusing ring while pressing the shutter button halfway. This provides quick fine
adjustment of focusing (DMF). Select the mode for correct DMF from the following. Set the DMF-mode switch to whichever you prefer.
Standard DMF (Std.)
Rotate the focusing ring to set correct DMF when the focus is locked in AF-A (automatic auto focus) or AF-S (single-shot
auto focus). Using this mode is recommended for normal subjects.
• DMF is not available in AF-C (continuous auto focus), when out of focus, or with continuous advance in AF-A after the second focus
is confirmed.
Full-time DMF (F TIME)
In any AF mode (AF-A/S/C), rotate the focusing ring while pressing the shutter button halfway to set correct DMF. This is useful to catch a fast-moving subject.
Depth-of-field scale
When focus is set on a subject, anything at that same distance will appear sharp, and anything within a certain range before and beyond the subject will also appear
in focus; this is called depth of field. Depth of field depends on the subject distance and aperture you choose and is indicated by the lines on the depth-of-field scale
corresponding to the aperture.
• The depth-of-field scale and depth-of-field table are for 35mm-format cameras. The depth-of-field is shallower when you use Digital Single Lens Reflex Cameras equipped
with an APS-C sized image sensor.
 Using focus-hold buttons
This lens has 4 focus-hold buttons.
Press the focus-hold button in AF to cancel AF. The focus is fixed and you can release the shutter on the fixed focus. Release
the focus-hold button while pressing the shutter button halfway to start AF again.
Set the focus-hold/prefocus switch to FOCUS HOLD and press the focus-hold button.
• The function of the focus-hold button can be changed on cameras with custom function capability. Refer to the camera manuals for
details.
 Switching focus range (AF range)
The focus-range limiter enables you to reduce the auto focusing time. This is useful when the subject distance is definite. You can also set the desired focus range
and select it.
Slide the focus-range limiter to select the focus range.
• FULL: The focus range is not limited. AF is set to the entire focus range.
•
∞ - 6.4m: AF is set to 6.4 m (21 feet) to infinity.
• SET: AF is set to the appointed focus range, both far and near positions.
To set the focus range
1
Slide the focus-range limiter to SET.
2
Focus the lens to the desired far or near distance.
• The focusing distance can be set in any focus mode: AF, MF or DMF.
• The far and near focusing distance can be set in either order.
3
Slide the focus-range setting switch to FAR or NEAR for the appropriate focus range position (depending on which position you set
first).
• The focus-range setting switch automatically returns to the original position.
• If the audio-signal switch is on, it beeps when you set the focus range.
• The focus range to be set is effective until a new focus range is set.
 Using prefocus
A specific subject distance can be stored and recalled at any time. With the distance set, this is useful for catching fast-moving subjects, such as a moving train,
events at a sports festival, or horse and car races, etc.
To set the subject distance
1
Slide the focus-hold/prefocus switch to PREFOCUS.
2
Focus the lens on the distance to be set.
• The focusing distance can be set in any focus mode: AF, MF or DMF.
3
Press the prefocus set button to store the subject distance.
• The stored subject distance is effective until a new subject distance is set.
• If the audio-signal switch is on, it beeps when you store the subject distance.
To recall the preset subject distance
1
Slide the focus-hold/prefocus switch to PREFOCUS.
• Set the focus hold button function to “focus hold” for cameras with custom function capability.
2
Press the focus-hold button so that the lens will focus to the prefocus position.
• When AF is set, press and hold the focus-hold button while taking pictures. If the focus-hold button is released, AF will be reactivated and the subject focus distance will
be changeable.
• If the audio-signal switch is on, it beeps when the preset subject distance is recalled.
 Using the audio signal
The audio signal beeps when the foc
button.
Slide the audio-signal switch to to set the signal on.
To set the signal off, slide the audio-signal switch to OFF.
 Changing the plug-in filters
A normal filter is equipped with your lens.
• The filter is a part of optical system component. Be sure to attach either the normal filter or the polarizing (circular) filter when taking pictures.
To change the plug-in filter
1
Push down the filter-holder lock and turn it counterclockwise 90° towards the lens front until the orange
index is aligned with the filter holder, and then lift the filter holder up.
2
Align the filter-holder lock orange index with the filter holder, face the side with the filter to the camera
body, and then insert the filter holder into the lens barrel.
3
Push down the filter-holder lock and turn it 90° to lock.
• The filter-holder lock orange index is perpendicular to the holder.
Specifications
Name
(Model name)
Equivalent
35mm-format
focal length* 1
(mm)
Lens
groups-
elements* 2
Angle of
view 1*
3
Angle of
view 2*
3
Minimum
focus* 4
(m (feet))
Maximum
magnification
(×)
Minimum
f-stop
Filter
diameter
(mm)
Dimensions
(maximum
diameter × height)
(mm (in.))
Mass (g (oz.))
(excluding
tripod-mounting
collar)
300mm F2.8 G
(SAL300F28G)
450 12-13 8°10’ 5°20’ 2.0 (8.2) 0.18 f/32
42
(exclusive use)
Approx. 122Ч242.5
(5 1/16Ч9 3/8)
Approx. 2,310
(81 1/2)
* 1 The value for equivalent 35mm-format focal length is based on Digital Single Lens Reflex Cameras equipped with an APS-C sized image sensor.
* 2 The values of lens groups and elements include the protective element and plug-in filter.
* 3 The value of angle of view 1 is based on 35mm-format cameras, and that of angle of view 2 is based on Digital Single Lens Reflex Cameras equipped with an APS-C sized
image sensor.
* 4 Minimum focus is the shortest distance from the image sensor to the subject.
• This lens is equipped with a distance encoder. The distance encoder allows more accurate measurement (ADI) by using a flash for ADI.
• Depending on the lens mechanism, the focal length may change with any change of the shooting distance. The focal length assumes the lens is focused at infinity.
Included items: Lens (1), Front lens cap (1), Rear lens cap (1), Lens hood (1), Strap (1), Normal filter (1), Plug-in polarizing (circular) filter (1), Trunk (1), Set of
printed documentation
Designs and specifications are subject to change without notice.
is a trademark of Sony Corporation.
Depth-of-field table (in meters)
f/2.8 f/4 f/5.6 f/8 f/11 f/16 f/22 f/32
∞ 921- ∞ 651- ∞ 460- ∞ 326- ∞ 230- ∞ 163- ∞ 115- ∞ 81.6- ∞
30m 29.1-31.0 28.7-31.4 28.2-32.0 27.6-33.0 26.7-34.3 25.5-36.5 24.0-40.1 22.2-46.5
15m 14.8-15.2 14.7-15.3 14.6-15.5 14.4-15.7 14.2-16.0 13.8-16.4 13.4-17.1 12.8-18.1
10m 9.90-10.1 9.87-10.1 9.81-10.2 9.74-10.3 9.63-10.4 9.49-10.6 9.29-10.8 9.02-11.2
7m 6.95-7.05 6.94-7.06 6.91-7.09 6.88-7.13 6.83-7.18 6.76-7.26 6.66-7.38 6.53-7.54
5m 4.98-5.02 4.97-5.03 4.96-5.04 4.94-5.06 4.92-5.09 4.88-5.12 4.84-5.17 4.77-5.25
4m 3.99-4.02 3.98-4.02 3.98-4.03 3.97-4.04 3.95-4.05 3.93-4.07 3.90-4.10 3.86-4.15
3m 2.99-3.01 2.99-3.01 2.99-3.01 2.98-3.02 2.98-3.03 2.97-3.04 2.95-3.05 2.93-3.07
2.5m 2.50-2.51 2.49-2.51 2.49-2.51 2.49-2.51 2.49-2.52 2.48-2.52 2.47-2.53 2.46-2.55
2m 1.997-2.003 1.997-2.003 1.996-2.004 1.99-2.01 1.99-2.01 1.99-2.01 1.98-2.02 1.98-2.02
To use the plug-in polarizing (circular) filter
1
Adjust the focus while looking through the viewfinder.
2
Rotate the adjust ring on the plug-in polarizing (circular) filter holder to adjust degree of polarization for shooting.
• The polarizing (circular) filter can reduce or eliminate unwanted reflections (polarized light) from nonmetallic surfaces of water, glass, windows, shiny plastics,
ceramics, paper, etc. It can also filter out polarized light from the atmosphere in general to produce richer colors. You can adjust the polarizing degree to get good
contrast when taking photos of blue sky.
• Generally, reflected light (polarization) should be minimized in photography, however you can adjust the polarizing degree for the desired effect.
• The amount of light reaching the image sensor decreases. If your camera is set to manual exposure mode and you are using a hand-held exposure meter, or if your
camera is set to manual exposure mode and you are using the Manual Flash Control function available on some external flash units, adjust the exposure compensation by
opening the aperture 1 or 2 stops to the + side.