I am told the wider the(10mm cf 100mm, for example) the deeper the depth of feild in the shot so I look at a landscape (say your standard seascape (land/foreground/ocean.skyline) and tell myself to go for a wide focal length and small apeture to ensure depth of feild and depth of focus too... right .. wrong.. well at least for me.
Assuming I have the notion right, that a wide angle (say a 10-22mm CF a 70-200mm) is going to give deeper depth of feild no matter what apeture you set on the camera, I go with the wide angle for landscapes. Then I tell myself okay set the Apeture at F 8 or F 11 or even F16 to promote end to end in the image, from foreground to background.. makes sense... so far so good right ?
Then I ask myself about focus points and thats where I get into confusion.
IF I use AUTOFOCUS on the 50D the camera punches out 9 focus points ...BUT I am told in AUTOFOCUS mode the camera will reach for the NEAREST to the CAMERA focus point and focus on that.....leaving anything beyond that closest to the camera focus point NOT , not focussed and crappy at the back.
So, I tell myself, use a manual focus point and either pick a focus point of the nine (the one in the middle mostly or if you want to be really picky a focus point covering your subject/centre of interest), but for landscapes there is no centre of interest, no specific individual one subject.... so then what ?
Am I confusing depth of feild with depth of focus. ..surely not.. thats the point of the , to control the of the image and blur (deliberately) sections of the image (eg birding or portraits or in this case, lizards).
Ah someone says, for landscapes use a wide angle , camera apeture at F.8 - F16 and use Manual focus, setting the at infinity..hey presto, back to front landscapes... really ? Is THAT it ?