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08-14-2009, 04:55 PM   #1
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Switch from zooming point/shoot to DSLR

Well I've had my K100D Super a few days now. Haven't been anyplace cool but have gone all over my house/yard. WOW the picks of my flowers with the K100D are AWESOME. MUCH Better than my p/s with 7.1 mp. Pictures of a big picture window with a reflection of a tree. Nothing awe inspiring but quality is great . (Best *** mode)

Everything is fairly intuitive to me -all the auto stuff. I'm a geek and I already have a canon point/shoot so no big deal. The preview was new though!

What I am not used to is the 18-55 lense...and no optical zoom and manual focusing. I have a 70-300 (eq to like 46x200 in Dslr land) ....

..now I really want a 18-250 but its NOT in the budget for now. I will have to switch lenses...inconvenient when you're not used to it.

This weekend I'm going to a local inside dog park kinda place (no sun but bright and lots of windows) with my camera (and not my dogs!..don't tell them!) to take pics of all the other dogs..moving, running, agility..should be fun. I am ONLY taking the 18-55 and seeing what all I can do with it.

That's all for now.

08-14-2009, 06:55 PM   #2
pbo
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QuoteQuote:
What I am not used to is the 18-55 lense...and no optical zoom and manual focusing.
Whaaa?? You know, if you turn the ring that's closer to the camera body, you'll zoom. If you turn the ring farther from the body, it'll manual focus. 18-55mm is the standard 3x zoom kit lens that ranges from wide to short telephoto, and one of the best kit lenses.

QuoteQuote:
I have a 70-300 (eq to like 46x200 in Dslr land) ....
I'm thinking you wanted to say that 70-300 has field of view equivalent to that of about 100-450mm lens on 35mm frame.
That's 4.5x zoom in P&S speak. Combined with 18-55mm, that's 16.7x zoom. Optical, of course. Again, in P&S speak.

QuoteQuote:
..now I really want a 18-250 but its NOT in the budget for now. I will have to switch lenses...inconvenient when you're not used to it.
What's so bad about switching lenses? That's a special thing about DSLR, you know? A hyperzoom P&S can get you a fixed 18-250mm zoom lens, like Pentax X70. Its lens is even wider than 18mm on the short end and telephoto side is almost twice as long as 250mm.

QuoteQuote:
This weekend I'm going to a local inside dog park kinda place (no sun but bright and lots of windows) with my camera (and not my dogs!..don't tell them!) to take pics of all the other dogs..moving, running, agility..should be fun. I am ONLY taking the 18-55 and seeing what all I can do with it.
Hm... Sounds like a better idea to use 70-300mm. 18-55 is mostly for wides and if you want to shoot running dogs, telephoto sounds like a better choice. Especially if you want to fill most of the frame with the dog itself, not 9 out of ten grass, and 1 out of ten dog.
08-14-2009, 07:09 PM   #3
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I was scouring the internet and with a 10% off 'code' + a Tamron $50 rebate , I sprung for a Tamron AF03P-700 AF 28-200 mm f/3.8-5.6 XR Di Aspherical IF for Pentax for a really good price! That'll fill in the middle I think. Probably can use this one as a walk around everyday lense and keep the 18-55 in the bag. I don't think I'll lug the 70-300 around much.


70/ 1.5 = 46.6 300/1.5 = 200 that's the way I read the conversion.... ???? wrong?
08-14-2009, 09:15 PM   #4
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QuoteQuote:
I was scouring the internet and with a 10% off 'code' + a Tamron $50 rebate , I sprung for a Tamron AF03P-700 AF 28-200 mm f/3.8-5.6 XR Di Aspherical IF for Pentax for a really good price! That'll fill in the middle I think.
Yep, that should fit in the middle. The image quality on longer focal lengths probably will be so-so, and 70-300mm would probably do better if you want to shoot something relatively far.

QuoteQuote:
70/ 1.5 = 46.6 300/1.5 = 200 that's the way I read the conversion.... ???? wrong?
It's other way around...

08-14-2009, 10:29 PM   #5
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QuoteOriginally posted by Denise Quote
70/ 1.5 = 46.6 300/1.5 = 200 that's the way I read the conversion.... ???? wrong?
The problem is knowing what you are trying to convert to. Why look at the 70-300 as anything other than 70-300? That's the question to ask first. The only reason would be so you can compare the field of view of that 70-300 on your DSLR to some other lens on some other camera. And the standard would be be 35mm film. 70-300 on a DSLR translates to 105-450 on 35mm film. So if for some reaosn you care about comapring to field of view on 35mm film, then 105-450 is what you are loking for. If you aren't trying to compare to a film camera, there's no reason to do any math: 70-300 is 70-300, period.

I'm also not sure what you mean about "no optical zoom". Of course the 18-55 has optical zoom; that's how it goes from 18-55, after all. As pbo says, you do it by turning the zoom ring on the lens itself - maybe you thought it would be a knob on the camera like with a P&S camera?
08-14-2009, 11:53 PM   #6
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QuoteQuote:
Why look at the 70-300 as anything other than 70-300?
Actually, Marc is right. You don't really have to "convert" anything. It's just that people usually "convert" focal lengths to their 35mm format equivalencies in field of view so that they can get a better idea of what they'll get when they look through the viewfinder. Since you just started, you might as well just remember what's what in APS-C speak.

Just remember that 18mm is somewhat wide, 16mm is ultrawide, 10mm or less is usually fisheye. 30mm is "normal", 50mm is short telephoto, 55mm is a portrait telephoto. Then there are longer lenses at about 100mm - those are *usually* macro, but work as portrait lenses as well. Longer lenses are, well, just long lenses and I don't have a description for those
08-15-2009, 12:52 AM   #7
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Welcome Denise.
Don't get yourself complicated with these APS-C focal length conversions.
Just think that 50mm gives you 50mm of optical focal length, though on a digital crop camera (like all Pentax dSLRs) there is some cropping of the image you see and take since they are not able to see all of the image that normal film (or full-frame) cameras can see.

50mm remains the 'normal' focal length, which is the equivalent of what the human eye can see (in magnification), anything higher in number is telephoto (higher magnification) and anything less is wide angle. Dedicated macro lenses are the true macro lenses, all other lenses that claim they're macro (like all macro zoom lenses) whilst having close focusing ability are not capable of macro photos like the true macro lenses are.

Enjoy your learning journey.
08-15-2009, 05:19 AM   #8
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I play golf and don't know how far (in yards) I hit the clubs but I know what it looks like and when I need a club I just know what to pick.

Same with lenses I think...which I why I wanted a DSLR...when I see it (and no waiting for developing!) I'll know....I just need practice!

08-15-2009, 05:24 AM   #9
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p.s. thanks for the conversion update...that was a bit confusing but in the right direction for me I think! ....now I have 18-55, 28-200, 70-300...ALL set I think ...and I WILL take the 70-300 for my dog outing! I'm really looking forward to it!
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