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Old 20th August 2006, 11:54   #76
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You need a DSLR and a macro lens. Can go for any of the DSLRs like Nikon D50, Sony A100(it has image stabilization built in).
So get a externel poweful flash too.
A D50+macro(closup) lens will cost around 800-900$ and same package for Canon will cost upto 1000$. Take what he likes better
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Old 20th August 2006, 12:21   #77
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Quote:
Originally Posted by tsk1979
You need a DSLR and a macro lens. Can go for any of the DSLRs like Nikon D50, Sony A100(it has image stabilization built in).
Nooooooo! I would have agreed with you until last month. Now that I own a F/2 100mm (effective) 1:2 macro lens, I have to disagree with you. The DOF on the macro lens is very low (<5mm), therefore you absolutely need to use tripod to get the exact thing you want. It takes a long time to snap one good macro photo, I am yet to do it after 3-4 sessions. I don't think the dentist is ready for that kind of commitment.

I suggest a P&S camera with good macro mode which can take handheld macro type photos.
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Old 20th August 2006, 13:04   #78
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I would go with Samurai's suggestion on this. Something with a minimum of 5MP, doesnt need much zoom. This is for smile designing, so most shots would be in the portrait category. Even macro wouldnt really be needed, I guess.

The camera will need to be easy to use, and also the camera will remain in the clinic. I dont think he will be taking it out for regular photography.
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Old 20th August 2006, 13:12   #79
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Quote:
Originally Posted by tsk1979
Nope, its nothing to do with film cams, its the Film ISO. A digicam on ISO 400 will be as sensitive as an ISO 400 Film. If you use a digicam on ISO 100, it will be as sensitive as a ISO 100 film.
Pocket cams have normally upto ISO 400, though are very noisy above ISO 100, and cams with large sensors(Sony R1, DSLRS) are pretty decent upto ISO 800 and get noisy above that. Canon usually is good till ISO 1600 in its DSLRS. Nikon D50 is also a good low noise cam.
Important point here is that the sensor has a base level ISO where it is at it's optimum sensitivity. When set to a faster ISO, it tries a kind of 'amplification' of the signals, ending up with more grain. So faster the ISO w.r.t it's optimum ISO, more the grain.

So, when selecting a cam, one would need to check until what ISO is the cam good, and try to remain within that ISO. Pls dont go just by the max ISO setting available. And pls try not to shoot at the higher ISO speeds available in the camera.

With film, the chemical content on the film changes to give us faster ISO's. With digital, the sensor remains the same. Any increase beyond it's optimum ISO setting has to be through a digital process.

eg.: Canon S3. Can select ISO 80 to ISO 800. Anything more than 200 ISO, and you will start seeing grains. Gets worse as you reach 400 & 800.

Last edited by condor : 20th August 2006 at 13:15.
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Old 20th August 2006, 13:53   #80
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i agree with Samurai that using tripod in dental clinic and camera's low DOF will be a pain for dentist.
He will also be taking close pics of teeth apart from smile designing.

Like condor,i also feel that 5-7mp should be good enough for him and picture quality is his main goal.

So can u guys suggest some good P & S camera with feature he is looking for under $1000 with brands name and model no. in some order.What accessories like flash will he need?
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Old 20th August 2006, 20:09   #81
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A note reg accessories while the check for the model numbers is on - flash is ruled out. A P&S wouldnt have a hot shoe. You would need to make do with the built in flash. And for the kind of photos he would be taking, the distance will not be much. Hence the built-in flash itself should be enough.

I change my prev'ly said line reg the macro - the macro will be required if he is taking pics of the teeth also.
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Old 21st August 2006, 04:08   #82
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Since the ligthing will always be the same (and can be altered to suit the camera) I don't think high ISO (and flash) will be required. He needs to alter a corner of his clinic to a somewhat like a studio. would be worth it.

apart from that, canon S2/S3 in super macro mode will do a pretty good job.

check this out

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Old 21st August 2006, 04:14   #83
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also if he is not a camera enthusiast, a tripod and remote/wired release will be a good option.

and probably some help from a professional photographer to set up the studio, and seting lighting etc for each kinds of shots required.

i say leftover money from buying a P&S cam can be well spent on these.
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Old 21st August 2006, 13:27   #84
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Quote:
Originally Posted by tsk1979
Nope, its nothing to do with film cams, its the Film ISO. A digicam on ISO 400 will be as sensitive as an ISO 400 Film. If you use a digicam on ISO 100, it will be as sensitive as a ISO 100 film....
granted my experience is a little limited.

My views were based on some expereince I had using a Nikon N80 and a D70 with the same lenses (18-70 kit lens, 70-300/4-5.6 ED lens, and to a lesser extent with 28-105/3.5-4.5 full frame lens). With the 50/1.8 prime neither hunted much but with the slower zoom lenses and ISO 100 film (D70 was also set to ISO 100) the D70 hunted a bit more (in low light) than the N80.
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Old 21st August 2006, 15:09   #85
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Navin, the hunting could be because of the auto focus module in the two bodies - but both are listed to have TTL phase detection with a CAM900 auto-focus module.

Also, did you get the N80 and the two lenses before the D70?

Last edited by condor : 21st August 2006 at 15:13.
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Old 21st August 2006, 15:15   #86
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tsk1979, as you right about ISO sensitivity being the same on film/digital cameras...one major area needs to be considered here..the lenses.

Quality of light transmission depends on lens speed/quality. That's the reason (probably) Navin mentioned about his experience. Reason enough for a real high speed lens to cost more than double than a slower lens of the same focal length.

Below, Arush and Khaddu were shot with a f2.8 lens (zoom) at ISO 3200 at regular room light.



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Old 21st August 2006, 16:08   #87
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Quote:
Originally Posted by Rudra Sen
Below, Arush and Khaddu were shot with a f2.8 lens (zoom) at ISO 3200 at regular room light.
I doubt this can be done using lesser cameras or any non-Canon cameras. My Olympus dSLR is not noisefree above 800, forget 3200. BTW, what was the shutter speed here and was it handheld? Besides, post-processing may not be an option for the dentist.
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Old 21st August 2006, 16:45   #88
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Quote:
Originally Posted by Rudra Sen
Below, Arush and Khaddu were shot with a f2.8 lens (zoom) at ISO 3200 at regular room light.
Rudra Sir, I was checking the EXIF values in Panda IEXIF, it says ISO 800, and aperture 4.5. Is Canon's EXIF format different from others?

\N
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Old 21st August 2006, 16:51   #89
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Quote:
Originally Posted by ntomer
Rudra Sir, I was checking the EXIF values in Panda IEXIF, it says ISO 800, and aperture 4.5. Is Canon's EXIF format different from others?
I agree, and the speed is 1/25. Is CS2 messing with the values. These are photoshoped images.
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Old 21st August 2006, 18:11   #90
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Quote:
Originally Posted by ntomer
Rudra Sir, I was checking the EXIF values in Panda IEXIF, it says ISO 800, and aperture 4.5. Is Canon's EXIF format different from others?
Hey, I'm totally lost here! What's this Panda IEXIF?

@Samurai, it was hand held (1/30 @ f6.7).
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