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The lateral shifts are less than the resolution of the highest power lens so it may not be necessary to correct them in all cases, however the axial shift between the blue and the other channels is more pronounced so you would need to correct that if you needed to register blue with everything else.
We have determined the current shifts and have created registration corrections that can be applied to images using Volocity. I am preparing a technical note explaining how to use the registration correctionsCorrecting chromatic shift using Volocity
What steps should I take to avoid crashes and hangs - especially during time-lapse?
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The SPE and SPE2 computers are not very powerful and aren't really designed for demanding applications like time-lapse. Nevertheless there are things you can do to optimise the disc so that errors are less likely.
For general acquisition sessions or time-lapses I would recommend that you do the following:
- Quit LAS AF and reopen it before starting your session to clear the TEMP folder of old .tmp files. This is especially true if the machine has been on for a long time or if it has been used for overnight time-lapse.
For anyone wanting to do time-lapses I would make the following further recommendations:
- Defragment the D drive before starting the time-lapse. Defragmenting the drive will make it easier for the software to write files to the TEMP folder. You will need to book time for this because it takes some time to defragment a drive.
- After the time-lapse has finished save your data, quit LAS AF and defragment the D drive again to undo fragmentation caused during the time-lapse. Again, this may take some time.