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Forum: Welcomes and Introductions 03-30-2012, 12:52 PM  
Beginner Jinkin
Posted By Jinkin
Replies: 7
Views: 761
Thank you NZ_Ross, and i agree there are so many things that k5 make manual lenses easier to use. I feel i'm discovering new smart functions every day. I haven't tried trap focus yet but it seems smart in some situations.

My newest addition to my collection of manual lenses is a vivitar 55mm 1:1 macro, i'm just awaiting my m42-pk adapter and better weather to play around with it. But if it takes to long i might try it out with some old film camera.

Hope you'll enjoy your stay here in june, weather is usually quite good then. I'll be awaiting my third son then, who's due at the end of june.
Forum: Troubleshooting and Beginner Help 03-29-2012, 02:55 PM  
Q: about magnification of old lenses on dslr and flashes
Posted By Jinkin
Replies: 8
Views: 1,746
Ah, i see. Thank for clearing that up TomB_tx.
Forum: Troubleshooting and Beginner Help 03-29-2012, 02:19 PM  
Q: about magnification of old lenses on dslr and flashes
Posted By Jinkin
Replies: 8
Views: 1,746
Thank you TomB_tx & Lowell Goudge for taking time to explain to me, i feel more sure about my thought on the matter now.

Am i correct in assuming that vignetting and edge softness might be more limited when using an old ff lens on a dslr with crop factor? What i'm thinking is that if my FoV is smaller then the edges of the lens wont effect the image nor will filters stacked cause problems in the same way as on a ff?
Forum: Welcomes and Introductions 03-29-2012, 02:08 PM  
Beginner Jinkin
Posted By Jinkin
Replies: 7
Views: 761
So far for the past 3 months i've owned it i enjoyed it for every moment. The only auto lens i got is the 18-55 that came with it, it's good at time but when i use it for me it feels like i could as well do with a compact p&c camera. My gf love the auto lens tho so for her sake i might have to invest in some more later. But there are definitely advantages with auto at times.
Forum: Troubleshooting and Beginner Help 03-29-2012, 09:14 AM  
Q: about magnification of old lenses on dslr and flashes
Posted By Jinkin
Replies: 8
Views: 1,746
I've been wondering about a thing when i comes to the magnification (crop factor) of old lenses on new dslr.
If i'm not completely out of the blue the magnification on my pentax k5 is 1.5.
Which to my understand makes my 50mm lens equal to a 75mm in terms of "magnification/crop factor/field of view" (not sure which term is correct, hope you understand what i mean).

Would this mean that my 55mm lens with 1:1 macro is equal to a 55mm 1.5:1 macro or a 77.5mm 1:1 macro ?
I'm guessing the latest, but would would be nice to be sure if anyone knows.

Another thing i been wondering about is if my focus distance is effected by the "conversion", personally i haven't noticed any difference so i guess it's not. But what i'm wondering is if for example my min focus distance is 20cm on an old lens would it on a dslr have 30cm min focus distance?

Also when using a flash with manual settings, the one i have have a selection of focal lengths, Zoom,24,28,35,50,70,80,105. When using an old lens should i use the focal length that the lens actually have or the "magnification/crop factor/field of view" that it give? The reason i'm wondering is because there is no settings for that.
My guess here is that i should use the settings matching the focal length on the lens and not what it converts to on a dslr but i'm unsure and like a confirmation if i'm doing it correct.

As i've understood it's mostly the field of view that is changed (smaller) when using a old lens on a new dslr camera and everything else is the same. But could that mean that i won't be so much affected with vignetting/soft corners and other similar problems some old lenses had on their originally intended cameras?

That the few things that's been on my mind lately. Hope i'm not to confusing with what i'm trying to say/ask.
And i'm sorry if these things have been answered before but i haven't been able to find a clear answers to my questions so far.

Thank you.
Forum: Welcomes and Introductions 03-29-2012, 08:47 AM  
Beginner Jinkin
Posted By Jinkin
Replies: 7
Views: 761
Hi there everyone Jinkin here i'm a beginner on photography tho not a complete virgin.
In highschool i took classes in photography and learned alot of useful things for a beginners level.

I recently bought a new K5 and have a set of lenses that i play around with.
Most of my lenses are old and manual lenses, but that works for me as i don't really like the automatics that much.

I've been reading on this forum for a while and learned a lot of useful things and i'm certain i will learn a lot more during my time here. Hopefully i'll even manage to contribute with something to this community.

Thank you for having me

/Jinkin
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