Road Train !!!!!!!!!!

by Russell McMahon

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18

I think you are putting too much emphasis on the "digital" part of the DG designation. It seems to be more to differentiate them from "digital" lenses that are APS-C only. Sigma calls their current APS-C only lenses "DC". When digital SLRs first began to gain a foothold in the market, they almost all had sensors that were APS-C or similar sized. So new ...


16

Yes, lenses designed for digital sensors have several differences from their older film based camera lens counterparts. One of the primary differences is that digital sensors are more reflective than film, so anti-reflective coatings are applied to the rear element of a digital lens. This helps prevent reflections off the sensor that could result in image ...


8

The Sigma 70-300mm F4-5.6 DG APO Macro is a lens that is available for both Sigma cameras and as a third party lens for many other brands, among them Nikon. These different manufacturers uses different lens mounts and this particular lens is available for Canon EF, Nikon F (FX), Pentax KAF, Sigma SA Bayonet and Sony/Minolta Alpha mounts. These mounts are not ...


6

Some 'film' lenses designed for 35mm rangefinder cameras have a rear element which lies quite close to the plane of the film or sensor (mostly wide-angle lenses). These work fine for film, but when used on a digital camera cause quite noticeable colour shifts to the left and right of the frame. This is due to the extreme angle of the light from the rear ...


6

There is one significant difference between film and digital sensor for lens optics - digital sensors have a bit of glass and some filters in front of them. The lensrental.com blog has a pretty extensive series of posts on the effect of the sensor stack (short version, there is a very real effect for large aperture lenses) - so it is quite possible that the ...


5

This photo is severely back focused. Areas about 15-20 feet behind the main subjects are in focus. Some things to keep in mind: When using wider apertures, especially combined with larger sensors, Depth of Field becomes shallower. So any focusing errors are more apparent. This is especially a problem in low light when most camera's auto focusing systems ...


4

You can't, the Nikon D200 is too old to be able to read the sensor in realtime in order to show you the image on the LCD screen. That feature was introduced with the D300 / D90


4

No, you don't need to install previous updates if installing a newer one, and on the camera settings it's possible to check the firmware version by doing the following: 1. Enter Setup Menu 2. Click on Firmware Settings option This link has the latest firmwares available for Nikon cameras: ...


3

Actually instead of holding the apeture lever or using an aftermarket adapter you can use your DOF preview button or live view when the lens is connected properly. Then without shutting the camera off, pop the lens off and your apeture should stay where you had it set while it was connected properly. Much easier and I have used this trick with a d3100, ...


3

From the symptoms you describe a virus is highly unlikely. Physical damage is a high possibility. When placed the card in the wallet, if you then placed the wallet in your back pocket and sat down this could have put significant stress on the card resulting in damage. If this is the case card is probably beyond economical recovery. If there is any ...


3

What do I do about bright spots in my Nikon D810 images? DPReview advise that <- Click me Nikon has announced a service advisory (in mid August 2014) for the Nikon D810, in response to reports of 'bright spots' at long shutter speeds and in 1.2X crop mode. According to an announcement on Nikon's website, affected cameras will be serviced free ...


3

There are various general considerations when buying a macro lens. What is compatible with my camera? Nikon's macro lenses include the word Micro in their name and their current line up can be found here. From those you would need an AF-S lens or you will not be able to use autofocus. What level of magnification are you looking achieve? The smaller the ...


3

The Coolpix 885 is a very old camera and it simply cannot address a card that big. The file system is only a guide to how data is organised and has nothing to do with how write operations are handled at the interface/card level. The camera needs to be able to write to any part of the card even if it is never going to be used by a partition/file. The ...


2

The two main places the sand could be is on your mirror or on your focus screen. I'd suggest using a bulb blower (e.g., RocketBlower), and not physically touching anything in the camera (e.g., using a brush or microfiber or something). Whatever you do, don't use canned air. Simply taking the lens off the camera will show you the mirror. The focus screen ...


2

The relevant details appear to be on page 167 of your manual under the custom bracketing settings. You can set the parameters to either be set manually or automatically, it sounds like they must have been changed to automatic from manual.


2

This is a personal choice based on how much you value the features. Go over the specifications, read the reviews, then decided. No one here can make that decision for you.


1

Sometimes you have to upgrade to a required level! You will have to check out the release nose of the latest firmware, it will tell you whether it is a cumulative update or you need to install a previous firmware first. Been there, done this. (Just a quick note: installing the latest firmware is sometimes not beneficial. I resisted to install a newer ...


1

I friend of mine found a solution in this site: The frequency is 38,4KHz


1

Yes, but it would depend on what Android device you have. DslrDashboard claims to support it on some Android devices: To be able to use the application with your USB connected DSLR you will need an Android device that supports the USB host function and an USB OTG adapter that you can buy cheap on internet or build it yourself. The application is free, ...


1

The picture was taken in low light conditions and then the following issues will start to conspire against the sharpness of the picture: The autofocus is not very accurate in low light conditions The small 18mm focal length instead of, say, 50 mm also makes the autofocus less reliable The exposure time of 1/60s seconds is not fast enough to prevent ...


1

The problem is that with a reverse macro adapter, the lens loses all electrical connection with the camera and thus its aperture will stay in the default setting, which is usually the smallest possible aperture that gives you very little light. If the lens does not have manual aperture control, I heard that you can get an "aperture control attachment", not ...


1

Some basic troubleshooting you can do, with anything really, is to systematically test everything you can control. In this case I would try it with/without different batteries and memory cards, try different buttons to see if you can get a response out of the screen. Try the DoF button to see if that causes anything to happen in the lens. Try different mode ...


1

This kind of thing can happen if your NEFCDC is out of date, since it needs to be updated for every new camera that comes out. If that doesn't work then try opening the NEF with with the View NX or Capture NX 2. Each NEF image includes a JPEG preview image. If the embedded JPEG preview has a green tint, then the NEF will too. You can also get a green ...


1

I have two old lenses that I knocked down causing dented filter ring. Both were attached to camera body. One was a 2ft drop onto a soft flooring, one was a 1/2 ft knock to a basin, when I was hanging the camera on my shoulder. Both lenses are still functionally intact.


1

I see this is an old post BUT here is my 2 cents worth of wisdom. I have a d7000 and I'm goi.g to get this lens and probably a 1.4 tc. I can't afford the bigger lenses or the 2.8 versions. After reading as many reviews on this lens and weighing all the other options this is what in left with. I bow hunt and have taken alot of deer and squirrels with a long ...



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