Macro Photography

mikpix · 09-25-2013, 08:31 PM

I recently bought a Pentax SMC f3.5 100mm macro lens. On the barrel it says that the closest it can get 1:2 on 35mm so what would the ration be on a Pentax K5.
Can anyone help.

DeadJohn · 09-25-2013, 08:38 PM

It will still be 1:2. You'll be the same distance away from the subject with a K5 or film. The K5 photo, compared to film, will appear to be more zoomed in because the APS-C sized sensor is smaller than film, but focusing distances don't change.scale

mikpix · 09-25-2013, 11:12 PM

Originally posted by DeadJohn

It will still be 1:2. You'll be the same distance away from the subject with a K5 or film. The K5 photo, compared to film, will appear to be more zoomed in because the APS-C sized sensor is smaller than film, but focusing distances don't change.scale

Thanks for that would a Pentax 100mm dental macro be 1:1.
To get to 1:1 I have to attach my Raynox 250 or tubes.

topace · 09-26-2013, 02:01 AM

The pentax A 100mm dental macro seems to be a version of the 100/4, which also only does 1:2.

You can of course use tubes to get it closer. Also, the dental version came with its own closeup filters. Those are probably very good.

Fogel70 · 09-26-2013, 02:55 AM

Didn't the Pentax 100/3.5 Macro come with a matched screw-on macro adapter that gave 1:1?

bluestringer · 09-26-2013, 05:19 AM

You don't need 1:1, just crop. Pentax K7 / Pentax 100mm f4 Macro...........

mikpix · 09-28-2013, 08:35 PM

I have bought a reversing ring so I can either put on my 28mm or 20mm. If I attach my 20mm to the front of the macro I can fill the viewfinder with a number on a ruler.

09-25-2013, 08:31 PM	#1
mikpix New Member Join Date: Sep 2013 Posts: 5	Macro Photography I recently bought a Pentax SMC f3.5 100mm macro lens. On the barrel it says that the closest it can get 1:2 on 35mm so what would the ration be on a Pentax K5. Can anyone help.

09-26-2013, 05:19 AM	#6
bluestringer Veteran Member Join Date: Nov 2011 Location: Cotton fields of South Georgia Photos: Gallery Posts: 2,748	You don't need 1:1, just crop. Pentax K7 / Pentax 100mm f4 Macro........... Last edited by bluestringer; 09-28-2013 at 09:20 AM.

Similar Threads
Thread	Thread Starter	Forum	Replies	Last Post
Flash for macro photography	catastrophe	Flashes, Lighting, and Studio	31	10-13-2013 04:41 PM
Micro - Not Macro Photography	LaurenOE	Photographic Technique	17	07-15-2013 12:15 AM
Macro insect photography	metaphiston	Photographic Technique	8	06-13-2012 01:59 AM
Mini flash for macro photography	trco	Flashes, Lighting, and Studio	8	11-14-2011 01:51 PM
Options for macro(or near macro) photography	dinneenp	Pentax SLR Lens Discussion	4	05-09-2010 01:26 PM

09-25-2013, 08:38 PM	#2
DeadJohn Pentaxian Join Date: Jan 2011 Location: New York Posts: 4,833	It will still be 1:2. You'll be the same distance away from the subject with a K5 or film. The K5 photo, compared to film, will appear to be more zoomed in because the APS-C sized sensor is smaller than film, but focusing distances don't change.scale

09-25-2013, 11:12 PM	#3
mikpix New Member Join Date: Sep 2013 Posts: 5 Original Poster	Originally posted by DeadJohn It will still be 1:2. You'll be the same distance away from the subject with a K5 or film. The K5 photo, compared to film, will appear to be more zoomed in because the APS-C sized sensor is smaller than film, but focusing distances don't change.scale Thanks for that would a Pentax 100mm dental macro be 1:1. To get to 1:1 I have to attach my Raynox 250 or tubes.

09-26-2013, 02:01 AM	#4
topace Senior Member Join Date: Sep 2011 Location: Stockholm Posts: 198	The pentax A 100mm dental macro seems to be a version of the 100/4, which also only does 1:2. You can of course use tubes to get it closer. Also, the dental version came with its own closeup filters. Those are probably very good.

09-26-2013, 02:55 AM	#5
Fogel70 Pentaxian Join Date: Sep 2009 Location: Stockholm, Sweden Photos: Albums Posts: 3,062	Didn't the Pentax 100/3.5 Macro come with a matched screw-on macro adapter that gave 1:1?

09-28-2013, 08:35 PM	#7
mikpix New Member Join Date: Sep 2013 Posts: 5 Original Poster	I have bought a reversing ring so I can either put on my 28mm or 20mm. If I attach my 20mm to the front of the macro I can fill the viewfinder with a number on a ruler.

Thread Tools	Search this Thread
	Search this Thread: Advanced Search