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<p>[QUOTE=&quot;messydesk, post: 2120655, member: 1765&quot;]Yes, I use f8-ish for most of my shots.&nbsp; Where the faster f2.8 lens comes in handy is when focusing.&nbsp; Twice the light comes through the viewfinder as compared to the f4 lens when focusing.&nbsp; When shooting the picture, f8 is the same for either.&nbsp; Since you have control over how much light you supply to the scene, the f4 lens and bulbs sufficient for a 1/40 sec. exposure at f8 with ISO set to 100 will be fine.</p><p>&nbsp;</p><p>In some cases, the optical quality of two very similar lenses will determine which one you want.&nbsp; Since both the 105/4 and 105/2.8 Micro-Nikkors are super sharp lenses, that doesn&#039;t come into play when choosing between them.[/QUOTE]</p><p><br /></p>

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