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09-27-2010, 08:47 AM   #1
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Pentax for Dental use

Hi
This is my first post and I would like to say that I realy enjoy being here.
I was reading this forum for couple of days and cannot stop since there so much information lol

I have a question to ask.....
I`m dental resident and I m being asked to buy a dslr with macro lens and flash ring so I would be able to take intraoral pictures.
Almost every single resident in my school have either Nikon or canon but I would like to go with Pentax since my father had a pentax for long time and he was more then pleased,also he has 5-6 different lenses so I was thinking beside the lens i would be purchasing I could probably use some of them.

I would like to go and buy
Pentax k-7,
Pentax D FA 100mm f/2.8 Macro Lens and
Metz 15 MS-1 Digital Wireless Macro Ringlight Flash

I prefer the K-7 since it have water protected body and metz wireless flash so i wouldn t be messing with the cables.

So any sugestions for better components,maybe something cheaper everything is appriciated....

Thanks

09-27-2010, 12:11 PM   #2
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74 looks and no replies
I'll answer your query
Firsly, welcome to this friendly forum.
Yes, the combination you chose is a sensible combination for the use you describe.
You may get cheaper by buying 2nd hand, but if you can afford new, I would always prefer that option. The current DFA 100 is weather resistant too, where the previous model was not.
09-27-2010, 12:16 PM   #3
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If you only need the camera for professional purposes, then I'd go as far as just recommending a used *ist D (since it fully supports TTL flashes), a used A 100/2.8 macro or A 100mm/4 macro, and the cheapest ring flash you can find. The manual focus won't hurt, since you'll likely end up doing that anyway, the image quality won't be worse because resolution isn't all too important in the macro setting, and, best of all, your photos will always be properly exposed that's to the TTL sensor. A setup like this can probably be acquired for less than $600, vs. almost $2000 for what you're suggesting (which isn't bad if you're willing to spend that much - but certainly overkill, I'd say).

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09-27-2010, 06:09 PM   #4
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Thank you the responces and maybe you guys are right I should go with second hand gear....
I would stilll prefer to get k7 so I could find used in 600-700 range ,and second hand macro lens would keep me in 1k range which would be perfect........

09-27-2010, 06:17 PM   #5
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If you go with the K-7 you should get either the D FA 100mm macro or a second hand "A" type or else you will be doing manual flash exposure due to the lack of TTL on the K-7 (manual flash exposure becomes bothersome I'd think).

Also, if you go with the K-7, you want to make sure that your ring flash supports P-TTL (Pentax' offering does). The cable shouldn't be bothering since the flash is mounted on the lens and only a short cable is required.
09-27-2010, 06:22 PM   #6
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A dental version of this lens exists - probably hard to find:

SMC Pentax-A 100mm F4 Macro Lens Reviews - Pentax Lens Review Database

Here is one, at a reasonable price:

http://cgi.ebay.com/Rare-Pentax-A-100mm-F-4-Dental-Macro-100-F4-/38026032541...item588948182b

Last edited by Ole; 09-27-2010 at 06:25 PM. Reason: Found the lens!
09-27-2010, 06:43 PM   #7
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Is this macro lens even close to those two previously mentioned?

SMC PENTAX-M 100mm f4 Macro K Lens For KM KX K1000 etc - eBay (item 170536859990 end time Oct-06-10 03:51:47 PDT)
09-27-2010, 06:45 PM   #8
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You were faster then me Ole thank you very much

Which flash ring would you guys suggest?

09-27-2010, 06:55 PM   #9
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If you plan to get a p-TTL flash, forget about M lenses. You need a lens with an "A" setting on the aperture ring, or a lens without an aperture ring.

Note that the 100mm SMC-M and 100mm SMC-A lenses quoted in the posts above can focus to only 1:2. Do you need 1:1?

You also should look at the Tamron 90mm macro F/2.8.
09-27-2010, 07:08 PM   #10
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Soldbear I have no idea what I need ;(
I would appreciated any help that I can get,I have no idea if I need 1:1 or whatever that means since I m monkey who knows how to click on pos camera that s about it.
I prefer to get K7 since I ll be using this camera for the next 3-4 years so I don t wont to change it after a year because I want something new,also I love taking pictures outside and I don t remember how many time the camera that I m using would get wet so i would like to be sure that I wouldn`t have any problem with that part.
So I prefer to get my lens and flash that would match with K7 if that lens posted by Ole is going to work with K7 I would get that ,if I have any cheaper solution I don t mind going with that.
For the ring flash again I don t have a clue what is the best choice ,if wireless only means bells and whistles I don t need it what ever is going to do the job I ll take it

Thank you again to everyone for the help.
09-27-2010, 08:31 PM   #11
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This is going to be long loong night I ve spend hours reading and trying to figure it out but I m useless lol....

So If i go with K7,Tamron 90mm macro F/2.8 what ring flash would be perfect paring for those two?

Just from browsing on Amazon there is some ring flashes starting for 50 $ but I guess that s waht I should avoid next in the line is:

--Sigma Flash Macro Ring EM-140 DG----379$

--Pentax AF160FC -------------------------449$

Any more suggestions ,something better maybe?
09-28-2010, 06:10 AM   #12
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QuoteOriginally posted by Basler30 Quote
That is an "M" lens so you will have no exposure automation and no p-TTL flash. I don't recommend it since it will be more hassle to get the exposure right.

I recommend that you go with the previously mentioned "A" lens, or the D FA. When doing macro work one seldomly uses autofocus so you can save some $$ by going with a second hand "A" series macro lens.
09-28-2010, 06:12 AM   #13
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QuoteOriginally posted by Basler30 Quote
This is going to be long loong night I ve spend hours reading and trying to figure it out but I m useless lol....

So If i go with K7,Tamron 90mm macro F/2.8 what ring flash would be perfect paring for those two?

Just from browsing on Amazon there is some ring flashes starting for 50 $ but I guess that s waht I should avoid next in the line is:

--Sigma Flash Macro Ring EM-140 DG----379$

--Pentax AF160FC -------------------------449$

Any more suggestions ,something better maybe?
The ring flash you pick must fit the filter diameter of the lens. Next, it must be compatible with Pentax P-TTL flash automation.


The Pentax AF160FC fits lenses with these filter diameters: 49mm, 52mm, 58mm and 67mm.

The Pentax D FA 100mm f/2.8 and the A 100mm f/4 macro lenses have a filter diameter of 49mm.

The Tamron's filter diameter is 55mm and it will not fit the flash without a 55-58 step-up ring which you must then purchase separately.

Last edited by Ole; 09-28-2010 at 06:19 AM.
09-28-2010, 07:20 AM   #14
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Thank so much Ole

I think i have two choices in my head right now .....

1--- K7 + D FA 100mm f/2.8 + Pentax AF160FC or

2----K7 + Tamron 90mm macro F/2.8 + Sigma Flash Macro Ring EM-140 DG

...Let s go back to reading through this forum .. I love this place......
09-28-2010, 07:28 AM   #15
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QuoteOriginally posted by Basler30 Quote
Thank so much Ole

I think i have two choices in my head right now .....

1--- K7 + D FA 100mm f/2.8 + Pentax AF160FC or

2----K7 + Tamron 90mm macro F/2.8 + Sigma Flash Macro Ring EM-140 DG

...Let s go back to reading through this forum .. I love this place......
Any combination of the above would work just fine. p.m. sent.
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