Reply to thread

Message

<blockquote data-quote="WayneF" data-source="post: 194307" data-attributes="member: 12496">I agree my pictures of this may not win many art awards.&nbsp; <img src="data:image/gif;base64,R0lGODlhAQABAIAAAAAAAP///yH5BAEAAAAALAAAAAABAAEAAAIBRAA7" class="smilie smilie--sprite smilie--sprite1" alt=":)" title="Smile&nbsp; &nbsp; :)" loading="lazy" data-shortname=":)" />&nbsp;&nbsp; But they were real world photos with their situation selected to clearly demonstrate the details how how the D lens distance works with TTL BL mode direct flash, and how FV Lock ignores that D lens distance for TTL BL mode.&nbsp; Agreed, some users don't care to know, and may not need to know.I have to disagree with your statement that FV Lock takes the new distance into account.&nbsp; It does refocus of course, but the idea is that &quot;FV&quot; is &quot;Locked&quot;, and if you move signifiicantly closer and take another, the second will overexpose (inverse square law).&nbsp;&nbsp; Part of my point is that FV Lock does NOT take D lens distance into account&nbsp; (like TTL BL direct flash tries to do when not FV Lock).&nbsp; Maybe try more extreme cases of movement, and you will see it. Two pictures at distant and close distances, with FV Lock with TTL BL, will show same effect as two pictures with Manaul flash or GN flash (all unvarying flash level).</blockquote>

[QUOTE="WayneF, post: 194307, member: 12496"] I agree my pictures of this may not win many art awards. :) But they were real world photos with their situation selected to clearly demonstrate the details how how the D lens distance works with TTL BL mode direct flash, and how FV Lock ignores that D lens distance for TTL BL mode. Agreed, some users don't care to know, and may not need to know. I have to disagree with your statement that FV Lock takes the new distance into account. It does refocus of course, but the idea is that "FV" is "Locked", and if you move signifiicantly closer and take another, the second will overexpose (inverse square law). Part of my point is that FV Lock does NOT take D lens distance into account (like TTL BL direct flash tries to do when not FV Lock). Maybe try more extreme cases of movement, and you will see it. Two pictures at distant and close distances, with FV Lock with TTL BL, will show same effect as two pictures with Manaul flash or GN flash (all unvarying flash level). [/QUOTE]

Verification