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About Photography / Artist Core Member Mark SchimmerMale/Germany Group :iconaranpa: ArAnPa
 
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Roger-Wilco-66
Mark Schimmer
Artist | Photography
Germany
www.mark-schimmer.de

My National Geographics gallery with mostly digital travel photography:

yourshot.nationalgeographic.co…

Tumblr:

roger-wilco-66.tumblr.com/
Interests
Among several other aspects, the medium format (6x6, 6x7...) itself has one big advantage over smaller formats.  The photographer can put a considerable emphasis on a subject by working with the very small depth of field aperture settings.  If you follow that line, you better know your lenses.  The Mamiya RZ lenses have a lever that can stop down to the preferred aperture and visually check the DOF, however, that does not always help due to the darkness of the focusing screen when you close the aperture. The Mamiya lenses also have a little slide ring that can be adjusted (aperture/distance) that show the DOF,  but it is relatively coarse.  So it's always better to know in advance what you can expect from your lens, and swap them if necessary.  There are three main aspects of depth of field that I try to keep in mind for the main lenses I use:

- hyperfocal distances (min, medium, max aperture)
- DOF at open aperture at 5 meter focus.  The 110mm/f2.8 has a DOF of around 140cm here.     
- DOF at open aperture with an extended focusing bellows at around 4.5ft / 1.5meters distance (typical close up).  At that distance the DOF with the 110mm/f:2.8 is only a few centimeters, around +- 6cm!   

Now, for my working horse lens, the 110mm f:2.8 lens I have these values pretty much memorized. This is a great lens and but has to be respected because of it's shallow DOF capabilities.  But what if you need precision?  What about the other fixed focus lenses?  
I tried to use smart phone DOF calculators, but gave up on them.  Too hard to read on bright sunny days, and I loath fumbling around with the phone while photographing.  I tried to print charts, but they only gave hyperfocal values.  Important enough, but the object distance is equally important, if not more.     A few days ago I found a slide rule type calculator on the net, which is pretty nifty and also works for other formats than 6x7, from 35mm up to 8x10 large format.        

For those who are interested, here it is:
nomographics.com/web/resources…

Now I have to figure out how to put it together in a sensible way :-)


Best,
Mark

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:iconroger-wilco-66:
Roger-Wilco-66 Featured By Owner Jun 25, 2017   Photographer
Cheers, Steve.  I've been a bit in a hiatus for the past months due to life circumstances, but I'll be back!


Mark
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:iconangerna:
Angerna Featured By Owner Jun 19, 2017  Hobbyist Digital Artist
I absolutely adore all the effort and time you put into your art and style!
and care to donate some points to my Channel? 1-50 would be good! 
My channel has good bright art!
Reply
:iconbatsceba:
Batsceba Featured By Owner Feb 21, 2017   Photographer
:heart: :iconthankyoutailsplz: Mark :blackrose:
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:iconroger-wilco-66:
Roger-Wilco-66 Featured By Owner Mar 7, 2017   Photographer
My pleasure :-)
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:iconjacac:
JACAC Featured By Owner Jan 25, 2017

t h a n k . y o u . Mark =)


a l l . t h e . b e s t . i n . 2 0 1 7 . =)

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:iconroger-wilco-66:
Roger-Wilco-66 Featured By Owner Jan 25, 2017   Photographer
You're welcome and thanks, José!  
Also best wishes for 2017!  :-) 
Reply
:iconjacac:
JACAC Featured By Owner Feb 9, 2017
=)
i . w i l l . t r y . m y . b e s t ... =)
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:iconkellycreepypasta:
KellyCreepypasta Featured By Owner Oct 9, 2016  Hobbyist General Artist
Hello Dear ! I hope you had a great day, or that you're having a great day, and that you're doing well ! :D (Big Grin)
I was wondering if maybe, if I could ask you, with all my apologize if it bother you, that I could borrow you 20 points (or more if you feel generous ! Giggle) to make a surprise present to one of my best friend ! :happybounce:
If yes, thank you so much !
If no, thank you for taking the time to read this message ! w00t!

Bye !
Reply
:iconroger-wilco-66:
Roger-Wilco-66 Featured By Owner Edited Oct 9, 2016   Photographer
That's a funny question, thanks for asking it.  It really brought a smile on my face and yes, I'm having a great day now, mulling over your offer.  

Let me check if I got that right:   You want to borrow me 20 points,  and since I feel generous I am indeed tempted to demand say 50 (thanks for reminding me on my generosity).   The reason for all that is to surprise your best friend.  What is the surprise?   That you have 20  (50...) points less on your account than before?       Well, be my guest.    

However, since the points are "borrowed" I surmise I have to give them back to you, after you surprised your best friend to his/her utter astonishment of you having 50 points less on your account.
I hope you don't mind my lack of imagination, but that seems a bit laborious just to create a surprise of a questionable degree.  I hope you are not offended by a suggestion, but couldn't you send him/her a photo of yourself washed through a one of these crazy snapchat filters (now these results can be really surprising!)  or something like that?  It also would benefit from not involving third parties in that undertaking and you risking not to loose your points if I feel even more generous and decide to keep them.

Oh by the way, Google returned 29,500 D/A  hits in a search for that "I hope you had a great day....." text above.  


Cheers,
Mark
Reply
:iconkellycreepypasta:
KellyCreepypasta Featured By Owner Oct 9, 2016  Hobbyist General Artist
No actually, I want gain as much points as I can to give my friend a core membership 😅 And I don't have snapchat, also I don't think she really cares about that...
But yeah! I Will give them back to you if you give me some! 😄
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