OK, let me put it this way...
As I already said I'm shooting with Tamron 80-210 AF and Tamron AF x2 converter. The problem is slow autofocus. While trying to catch a car or a bike on fast race track, most of the time standing very near the fance- or track, AF is just going on and on ... I have to point it on a piece of engine(bike) or some sticker(car) and then to follow with camera. Otherwise is no way to get a sharp and clear picture. If I point on a track while waiting for bikes(cars) to come and try to focus it.. its over. Then I have to focus it manualy very quick. I'm talking about begin distance 50-100 meter. Film is Fuji HG 1600 with 1/500 or 1/1000.
And something else, the objects that fit in to the diameter of the lens are allways much smaller on the photo. Is there some rule to calculate or something..!??
Anyway, I stil dont have $ for F100 or F5 so I have to go on with my lovely f801s. If I can't make a nice pics with my gear.. there is no other gear that can help me. At least I'm onest.
Thanx for u'r time...
#1. "RE: re racing & F801s" | In response to Reply # 0frankie Basic MemberWed 13-Sep-00 12:16 PM
You must point the central focus bracket on something that has either lines, or contrast between it. That is how the focusing works. The camera sees the track as monotone, and tries to rack the lens in and out to see if there is anything lying between the camera and the track to be focused on.
So, either focus on the car sticker/body/engine, or manually focus.
Be prepared to flick to manual focus mode for objects that aren't very contrasty... The f801s is known for having a relatively slow focus drive.
#2. "lens and converter may be problem" | In response to Reply # 0f8bthere Basic MemberWed 13-Sep-00 06:37 PM
I have an F801s and find it to be fine. I only use fast lenses which is better for the receptors in the camera. All Nikon, all primes. I own zooms, but just about gave up on them for action.
You don't mention the f-stop of your Tamron lens... I know they make a 70-210 f2.8, but you say 80-210, so I guess that the f-stop is smaller. Be aware that no matter the stop, the 2X converter automatically reduces the light by 2 more stops... in other words an f2.8 lens is rendered to being an f5.6 lens. If your lens is slower... the news is worse. a Shifting aperture lens, like an f4-5.6 is effectively an f8-11... bad news because the camera needs at least an f-stop of f5.6 to work effectively. The pro f2.8 lens would be right at that limit, and if the light is poor that f5.6 threshold may still not be enough. This is why pro's that shoot this type of subject for a living have no problem justifying the cost of those big, fast telephoto lenses.
Also be aware, the use of a 2x converter is always a compromise. The most expensive lens / converter combo's are really good these days, but the standard consumer level (independant) combos can't deliver the best results wide open. If you close that f8-11 lens down the two stops needed to sharpen the combo... well then you are in the area of handholding a 400mm lens at way too slow of a shutterspeed. Again, the pro's are using f2.8 primes... they can't aford not to.
Your problems may be any one of these things... or a small bit of all of them. Your camera is dated a bit... but I'd put my money on the lens / converter being the reason for lack of snap.
#3. "RE: lens and converter may be problem" | In response to Reply # 2bgs Charter MemberFri 15-Sep-00 05:53 PM
LAST EDITED ON Sep-15-00 AT 09:53 PM (GMT)
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