I recently wandered online, I found a post on infrared photography, very good: description link: http://vip.6to23.com/irphoto/index.php/www/content/view/full/56/56.html Two ways to shoot infrared photos using Sony 707 or 717 digital camera Since Sony 707 and 717 infrared ability, there are two ways, here is a brief introduction.
Two methods: Nightshot Mode: and normal mode: Nightshot mode is Sony's night vision, actually. We take two methods in the best way to shoot infrared during the day:
Nightshot mode:
Nightshot mode is SONY's own night vision, in fact, it is. The best way we filmed in the day is this mode.
Sony said during the day, using the Nightshot mode to damage the CCD, right, yes. But don't we have an infrared filter, and it is a set of mirrors, there are three :)
If you shoot time, you naturally know that it is suitable. But if you are a rookie who have just started, it doesn't matter. Here you will introduce a simple method:
The correct use of the filter is: first, the deepest IRD, then place the camera on the Nightshot and automatic exposure.
Then you look at your exposure time, if there is between 1 / 30-1 / 60. Then you can shoot. If the time is less than 1/30, this filter is relatively deep, please change the IRC, the same, can be changed to IRB, if it is no longer, indicating that the current environment is very dark. This situation usually only in the cloudy rain.
Of course, is there possible to use IRD, the exposure is still more, the picture is still bright. It is generally not this situation, but extreme cases, such as taking a camera with a nightshot pattern. Summer sun.
Ordinary mode:
M and s methods in normal mode can be. In the case of a good day, about 4 "aperture F2.5, must use a tripod, it is best to prevent vibration in the Selfie. S mode set speed at 4". Then adjust according to the shooting effect.
This mode is easy to shoot, the trees float and water flow in the wind.
note:
Shooting infrared photos, 707/717 must, turn off the infrared lamp before the lens. Closed method is not a good way, you can only use it.
The best way to cover is to choose, the core of the floppy disk, paste with double-sided plastic. M358x series use skills in Sony707 Nightshot mode
The M358X series includes M358, M358A and M358B, etc., which are characterized by including a variety of infrared filters, how to use in SONY707, 717?
Let's talk about Sony 707 and 717, they have strict requirements for NightShot, and the exposure area is very narrow, and cannot be manually adjusted. It can only be automatically exposed by the machine.
In other words: In the Nightshot mode, the camera is easily exposed or insufficient. The user is easy to confirm this view, as long as you use the nightshot mode during the day.
Simply remember the following rules:
Rainy, cloudy, with IRA or IRB cloudy, sunny, with IRC sunny day, use IRD
why? Simple explanation is that the amount of infrared rays from IRA to IRD is not the same.
For example, the wavelength of IRD is approximately 950 nm. If IRD is used in the cloudy day, it is likely to be exposed for a long time because of insufficient exposure, so unless the tripod is used, it is not easy to clear. It is very good to use IRA at this time, because 720 nm IRA, IRB can be used as a crew of visible and infrared filters. For users with professional requirements, there is another way to consider:
Press the camera shutter from the lower half of the Nightshot, if this time the exposure time is maintained between 1/30 and 1/60, the situation is justified.
If less than 1/30 ", it means that the infrared filter is too deep, and the infrared filter needs to be replaced, so that you test your filters until IRB, or IRA.
There is a problem: if the IRB is still less than 1/30 ", how is it, the infrared light is very insufficient, you can use IRB.
If, when using IRD, the picture is exposed, what should I do? It should be said that this time is rare, unless you take the camera to shoot the sun in the afternoon!
Determine if your digital camera has the ability to shoot infrared photos
Almost all cameras can take infrared photos, but how can you confirm whether your camera has infrared shooting capabilities? Here tells you an effective way.
In general, almost all digital cameras have the ability to shoot infrared photos, and the photosensitive components used by digital cameras are CCDs or CMOS, which have received capacity for infrared rays. The reception of the CCD is greater than CMOS.
Check your DC via TV remote control
However, in general, digital cameras have a normal color imaging quality of infrared sensing images, and there is a filter that can block infrared rays in front of each digital camera, this filter professional call (ICF). It filter out infrared.
For convenience of photography under the dimming conditions of light. 99% of the infrared filter of the 99% digital camera has no 100% filtration, (in fact, 100% filtration is also uncomfortable)
It can therefore be said that there are more or less in the hands of each person, with the ability to receive infrared rays, just the difference in the received amplitude. But whether it can receive an infrared ray that is sufficiently imaging. There is a simple test method here.
Testing TV remote controls in home, the home-friendly TV remote control is usually transmitted infrared. In general, when we press a button, the remote control will transmit a bunch of infrared signals, and the human eye is invisible.
We use digital cameras to align your TV remote control, select the moonlight or night shooting mode, turn off the flash, shoot this remote control with the button.
If you can clearly shoot the lighting point on the remote control. Then your digital camera is a camera with an infrared ability. You can use it for infrared photography.
Difference between different models of infrared filters
The infrared area is a spectral area from 760 nm to about 10,000 nm. Therefore, different wavelengths of infrared filters are different. Here is a different feature different from the infrared filter provided on this website.
It can be said that there is a difference between different brands and different models of infrared filters, some are similar, and some are the same glass. Some are completely different.
Different infrared filters have different models indicate that they are "out" in the amount of infrared rays. This is like the same blood, but there is ABO and other blood.
Similarly, from 700 nm from an infrared section of about 1200 nm, there are different infrared filters, and different infrared passes.
In contrast, the difference between infrared wavelengths far exceeds the difference between similar models between different brands. (The premise, of course, all the infrared filters are genuine :)), that is, if two different brands, if the characteristics of the infrared glass are the same or approximate, then their performance in infrared photography is the same or approximative. of. For example, the infrared filter IRA, IRB, IRC, IRD, customized here, is comparable to the filter curve comparison, respectively, respectively, respectively, respectively, and some brands of filters.
IRA: equivalent to Hoya R72 / Kaya PF4 / SCHOTT (B W) RG715 IRB: equivalent to Hoya IR760 IRC: Equivalent to Hoya IR85 / SCHOTT (B W) RG850 IRD: Very similar to Hoya RM90 / SCHOTT (B W RG1000
It is quite meaning here. For example, if IRC and Hoya IR85 were taken, the shooting effect was the same, and from the photo could not distinguish it in the end of the filter.
Experienced players can look at the curve between them Note: IRA is provided with Hoya R72, Kaya PF4 and SCHOTT (B W) RG715 curve comparison IRC with Hoya IR76 curve compared to HOYA IR85 and SCHOTT (B W RG850 curve contrast IRD with Hoya RM90 and SCHOTT (B W) RG1000 curve comparison digital camera how to use a filter and match the selection spun ring
To add a filter in front of a digital camera, you must first confirm that your digital camera can have a place where the filter is installed, usually three cases
A. The camera itself does not have a place where the filter is mounted, and the auxiliary accessories cannot be installed. B. The camera itself does not have a filter installed in the filter, but can get the ability to configure the filter by adding the adapter. C. The camera itself has a threaded port of a configuration filter.
For A, there is no way, your camera is not configuring the filter, unless you are willing to put the filter before the filter is placed, otherwise there is no way to use the filter. B, and C is similar. These cameras have the ability to add filters regardless of whether they purchase the adapter. The following two cases will be described. As for what specific model camera can be installed, what model cannot be installed, please look at the common digital camera filter diameter table with the attached.
Several concepts of wearing filters: 1) caliber, a key size of the filter is the diameter of the filter. It is usually the case where the lens is usually said, and the diameter is different for different digital cameras, which is generally expressed in millimeters. For example, the diameter of Nikon990 is 28mm; Sony 707's caliber is 58mm, etc.. 2) Thread, generally .75, very few lenses are .5. It is generally not considered. 3) When the transfer ring, when the lens and the filter size do not match, it is necessary to add a split ring in the filter and the lens. Generally, two parameters are expressed, the first represents the lens, the second represents the filter, such as 55-58, indicating that this is a shot of 55 mm to the 58 mm filter to a 58 mm filter. There are a variety of sizes, and later will be described later.
