Win a Pentax Limited Lens: Raffle Now Live!

minolta4me-kevin · 02-08-2019, 01:35 PM

Hi, I read the articles on STF lenses and was surprised to read that no camera can achieve STF ? I believed the Minolta film camera the Dynax 7 [also known as the Maxxum 7] was the "only" camera to achieve STF in camera and has a setting just for that ? Albeit not for moving objects, but that distinction exists in the article anywat as no images with moving objects were used.

**twilhelm** · 02-08-2019, 01:36 PM

Originally posted by minolta4me-kevin

Hi, I read the articles on STF lenses and was surprised to read that no camera can achieve STF ? I believed the Minolta film camera the Dynax 7 [also known as the Maxxum 7] was the "only" camera to achieve STF in camera and has a setting just for that ? Albeit not for moving objects, but that distinction exists in the article anywat as no images with moving objects were used.

Welcome to the forum.

Do you have a link to the article?

Adam · 02-08-2019, 01:38 PM

Smooth Trans Focus: The Ultimate Guide - Articles and Tips | PentaxForums.com

**twilhelm** · 02-08-2019, 01:40 PM

Thank you Adam

photoptimist · 02-08-2019, 02:24 PM - **1 Like**

STF is generally a property of the lens and requires specific changes to the design of the elements adjacent to the aperture iris. In theory, one could make an apodization filter for any lens that has a waterhouse stop (i.e., a removable stop).

STF can be simulated by any camera by taking and superimposing a set of shots taken at different apertures (that seems to be what the Minolta did). As a multi-exposure technique it requires a stationary subject and a stationary camera so that all the shots align nicely. These days, any digital camera can do it, especially if one can use remote control software to fire off a set of shots.

**Kerrowdown** · 02-15-2019, 01:16 PM

Welcome to the forum, I must admit this is a technique or a shooting style that I've never had a need for.

02-08-2019, 01:35 PM	#1
minolta4me-kevin New Member Join Date: Feb 2019 Posts: 1	Introduction and comment on Smooth Transitional Focus Hi, I read the articles on STF lenses and was surprised to read that no camera can achieve STF ? I believed the Minolta film camera the Dynax 7 [also known as the Maxxum 7] was the "only" camera to achieve STF in camera and has a setting just for that ? Albeit not for moving objects, but that distinction exists in the article anywat as no images with moving objects were used.

02-08-2019, 01:38 PM	#3
Adam Administrator Site Webmaster Join Date: Sep 2006 Location: Arizona Photos: Gallery \| Albums Posts: 51,608	Smooth Trans Focus: The Ultimate Guide - Articles and Tips \| PentaxForums.com Adam PentaxForums.com Webmaster (Site Usage Guide \| Site Help \| My Photography) PentaxForums.com server and development costs are user-supported. You can help cover these costs by donating or purchasing one of our Pentax eBooks. Or, buy your photo gear from our affiliates, Adorama, B&H Photo, KEH, or Topaz Labs, and get FREE Marketplace access - click here to see how! Trusted Pentax retailers:

Similar Threads
Thread	Thread Starter	Forum	Replies	Last Post
Post your Smooth Trans Focus Lens Images	K David	Lens Clubs	14	04-15-2016 11:59 AM
For Sale - Sold: Nikon Nikkor-S 50/2 transitional model (rare)	RBullCZ	Sold Items	0	08-15-2011 12:26 PM
Personal Introduction and comment	Windjammersgh	Welcomes and Introductions	7	03-17-2011 01:53 AM
Transitional Super-Takumar lenses?	ChrisPlatt	Pentax SLR Lens Discussion	6	09-20-2010 12:45 PM
Pentax DA 21mm - ring focus not smooth?	gemini	Pentax SLR Lens Discussion	6	02-05-2009 03:45 PM

02-08-2019, 01:36 PM	#2
twilhelm Loyal Site Supporter Join Date: Feb 2009 Location: Florida Photos: Gallery \| Albums Posts: 2,369	Originally posted by minolta4me-kevin Hi, I read the articles on STF lenses and was surprised to read that no camera can achieve STF ? I believed the Minolta film camera the Dynax 7 [also known as the Maxxum 7] was the "only" camera to achieve STF in camera and has a setting just for that ? Albeit not for moving objects, but that distinction exists in the article anywat as no images with moving objects were used. Welcome to the forum. Do you have a link to the article?

02-08-2019, 01:40 PM	#4
twilhelm Loyal Site Supporter Join Date: Feb 2009 Location: Florida Photos: Gallery \| Albums Posts: 2,369	Thank you Adam

02-08-2019, 02:24 PM - 1 Like	#5
photoptimist Pentaxian Join Date: Jul 2016 Photos: Albums Posts: 5,128	STF is generally a property of the lens and requires specific changes to the design of the elements adjacent to the aperture iris. In theory, one could make an apodization filter for any lens that has a waterhouse stop (i.e., a removable stop). STF can be simulated by any camera by taking and superimposing a set of shots taken at different apertures (that seems to be what the Minolta did). As a multi-exposure technique it requires a stationary subject and a stationary camera so that all the shots align nicely. These days, any digital camera can do it, especially if one can use remote control software to fire off a set of shots.

02-15-2019, 01:16 PM	#6
Kerrowdown PEG Moderator Join Date: Aug 2008 Location: Highlands of Scotland... "Hold Infinity in the palm of your hand" - William Blake Photos: Gallery Posts: 57,864	Welcome to the forum, I must admit this is a technique or a shooting style that I've never had a need for.

Introduction and comment on Smooth Transitional Focus

Win a Pentax Limited Lens: Raffle Now Live!